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Wyszukujesz frazę "Nabialek, M" wg kryterium: Autor


Tytuł:
Approach to Ferromagnetic Saturation for the Bulk Amorphous Alloy: $(Fe_{0.61}Co_{0.10}Zr_{0.025}Hf_{0.025}Ti_{0.02}W_{0.02}B_{0.20})_{97}Y_{3}$
Autorzy:
Błoch, K.
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1386293.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.50.Kj
75.30.Ds
75.20.En
75.47.Np
75.50.Bb
75.60.Ej
Opis:
The aim of this paper was to conduct studies concerning the magnetization of bulk amorphous $(Fe_{0.61}Co_{0.10}Zr_{0.025}Hf_{0.025}Ti_{0.02}W_{0.02}B_{0.20})_{97}Y_{3}$ alloy when subjected to strong magnetic fields: the specific focus of the paper is the area known as the approach to ferromagnetic saturation. The investigated alloy samples were produced using the suction-casting method, resulting in plates of dimensions 10 mm × 5 mm × 0.5 mm and rods of length 20 mm and diameter 1 mm. The structure was studied using X-ray diffractometry. It was found that investigated samples were amorphous in the as-cast state. The magnetization was measured in a strong magnetic field using a vibrating sample magnetometer. On the basis of the obtained results, the type of structural defects having influence on magnetization in high magnetic fields were determined for the bulk metallic glasses manufactured with different cooling rates.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 413-414
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Thermal and Magnetic Properties of Amorphous Ribbons of Fe₆₁Co₁₀B₂₀Y₈Me₁ (where Me = W, Zr, Nb, Mo)
Autorzy:
Pietrusiewicz, P.
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1032157.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
75.50.Kj
65.60.+a
75.30.Gw
Opis:
This paper presents the results pertaining to thermal and magnetic studies of rapidly-cooled samples of the alloy family Fe₆₁Co₁₀B₂₀Y₈Me₁ (where Me = Nb, Zr, W, Mo). The resulting ribbons, or tapes, have amorphous structure. It has been found that the addition of Me elements alters the thermal and magnetic properties. It is noted that the saturation magnetization decreases with increasing number of unpaired electrons on the valence shells. In addition, the value of the coercivity and effective anisotropy have been determined.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 678-680
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and magnetic properties of the classical amorphous alloys: Fe₆₁Co₁₀Y₈Me₁B₂₀ (where Me = W, Mo)
Autorzy:
Pietrusiewicz, P.
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1113170.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.50.Bb
75.50.Lk
75.50.-y
61.43.Dq
61.43.-j
68.37.Hk
75.70.Ak
Opis:
A study has been conducted into the effects of substituting small quantities of alloying elements (tungsten and molybdenum) on the structure and magnetic properties of classical amorphous alloys that are based on the formula: Fe₆₁Co₁₀Y₈Me₁B₂₀. The structure of the resulting alloy samples was examined using X-ray diffraction, Mössbauer spectroscopy, and scanning electron microscopy. Based on the results of these studies, it was found that the obtained alloys were amorphous. Images from the scanning electron microscope were typical for amorphous materials. Cross-sectional images were homogeneous and did not contain "vein- and scale-type" precipitations. Studies examining the magnetic properties of the samples were carried out using a vibrating sample magnetometer. It was found that the alloy featuring the addition of tungsten exhibited a significantly greater saturation of magnetization and a substantially lower coercivity. This resulted from the fact that the atomic radius of tungsten is much larger than that of molybdenum, resulting in increased difference between the atomic constituents of the alloy; This, in turn, improves the glass-forming ability.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 920-922
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influences of Production Method and Minor Chemical Composition Changes on the Microstructure of the Alloy: $Fe_{62-x} Co_{10} Y_8 Mo_x B_{20}$ (where x=1 or 2)
Autorzy:
Nabiałek, M.
Garus, S.
Powiązania:
https://bibliotekanauki.pl/articles/1398367.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.50.Kj
75.30.Ds
75.20.En
75.47.Np
75.50.Bb
75.60.Ej
Opis:
In this work, the results of studies concerning the structure of polycrystalline and amorphous alloys are presented. The samples were produced in a single-step production process, using two different production methods, and under a protective argon atmosphere. The quenching speed of the molten alloy was different for each of the production methods. Samples were subjected to analysis using X-ray diffractometry, scanning electron microscopy, and computer tomography. It has been shown that the samples manufactured with a higher cooling rate feature an amorphous structure; On the other hand, the samples obtained using the method with the lower cooling speed consist of crystallites of three crystalline phases with sizes of the order of μm. The amorphous samples exhibited a varied fracture surface as well as an increase in the contribution of pores to their volume, in comparison to the samples obtained at the lower cooling speed.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 1010-1012
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
  • odwiedzone
Tytuł:
The Influence of Heat Treatment on Irreversible Structural Relaxation in Bulk Amorphous Fe₆₁Co₁₀Ti₃Y₆B₂₀ Alloy
Autorzy:
Błoch, K.
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1386504.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.50.Kj
75.30.Ds
75.20.En
75.47.Np
75.50.Bb
75.60.Ej
Opis:
Amorphous materials contain structural defects, which play a key role in the magnetization process within the condition known as the "approach to ferromagnetic saturation". This paper presents the results of magnetization studies, carried out on bulk Fe₆₁Co₁₀Ti₃Y₆B₂₀ alloy when under the influence of a strong magnetic field. The alloy samples were obtained in the form of a rod 1 mm in diameter, and tested in the as-quenched state and after an isothermal annealing process, at a temperature below the crystallization temperature. It was observed that the heat treatment, carried out below crystallization temperature Tₓ, leads to irreversible structural relaxations, specifically reorganizing the atomic configuration within the volume of the alloy into an amorphous structure.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 442-444
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and magnetic properties of amorphous Fe₈₂Zr₇Nb₂Cu₁B₈ and crystalline Fe₈₂Zr₆Y₁Nb₂Cu₁B₈ alloys
Autorzy:
Gondro, J.
Błoch, K.
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1153084.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Np
75.50.Bb
75.50.Kj
75.90.+w
Opis:
In order to obtain an alloy with a specific set of magnetic properties, the dominant influences of chemical component and thermal treatment selection need to be satisfied. In this paper, the results of investigations into the microstructure and magnetic properties of the following alloys are presented: amorphous Fe₈₂Zr₇Nb₂Cu₁B₈ and crystalline Fe₈₂Zr₆Y₁Nb₂Cu₁B₈. The structure and microstructure were examined using the Mössbauer spectroscopy and X-ray diffractometry. The Fe₈₂Zr₇Nb₂Cu₁B₈alloy was found to be fully amorphous in the as-quenched state and the transmission Mössbauer spectrum for this alloy is typical of that for weak ferromagnets, with an average hyperfine field of 9.86(2) T. The shape of this spectrum was found to have changed noticeably in the case of the Fe₈₂Zr₆Y₁Nb₂Cu₁B₈ alloy. This change was attributed to the presence of the crystalline phase bcc-Fe.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 909-912
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Heat Treatment on Soft Magnetic Properties of the $Fe_{60}Co_{10}Mo_{2}Y_{8}B_{20}$ Alloy
Autorzy:
Garus, S.
Nabiałek, M.
Garus, J.
Powiązania:
https://bibliotekanauki.pl/articles/1375479.pdf
Data publikacji:
2014-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.50.Kj
75.30.Ds
75.20.En
75.47.Np
75.50.Bb
75.60.Ej
Opis:
This paper presents the results of studies on the magnetic properties of the $Fe_{60}Co_{10}Mo_{2}Y_{8}B_{20}$ alloy. The samples were fabricated in the form of plates by the injection-casting method. The structure of the investigated alloy, in the as-quenched state and after annealing, was verified by using X-ray diffractometry. The magnetization curves as a function of temperature were measured by a force magnetometer. From thermomagnetic curves the Curie temperature of the alloy was determined. As a critical parameter β was chosen to be equal to 0.36 for these calculations, it confirmed that the alloys may be considered as ferromagnetic of the Heisenberg type. Additionally, using a vibrating sample magnetometer the magnetization and coercivity field were studied (in magnetic field up to 2 T).
Źródło:
Acta Physica Polonica A; 2014, 126, 4; 960-962
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and Magnetic Properties of Amorphous $Fe_{60}Co_{10}Mo_{2}W_{x}Y_8 B_{20-x}$ (x=0, 1) Alloys
Autorzy:
Błoch, K.
Nabiałek, M.
Garus, S.
Powiązania:
https://bibliotekanauki.pl/articles/1398365.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Np
75.50.Bb
75.50.Kj
75.90.+w
Opis:
This paper presents studies of the bulk amorphous alloys: $Fe_{60} Co_{10} Mo_2 Y_{8} B_{20}$ and $Fe_{60} Co_{10} Mo_2 W_1 Y_8 B_{19}$; Both compounds were obtained by means of the injection-casting method in which liquid alloy is forced under pressure into a copper mould. The structure of the samples was studied using X-ray diffraction and scanning electron microscopy. Based on the results of the X-ray diffraction studies, it was found that the samples were in the amorphous state. Scanning electron microscopy image analysis of fractured alloy samples indicated the presence of areas of varying degrees of relaxation: "smooth", "vein", and "flake" fractures. The manufactured ferromagnetic samples were characterized by so-called soft magnetic properties with a relatively high Curie temperature of more than 520 K. In the investigated samples, the saturation magnetization was found to have been decreased from 1.14 T to 1.13 T after the addition of W. Tungsten also contributed significantly to an increase in the value of the coercive field, from 27 A/m to 8685 A/m. Following the addition of just 1% of W to the alloy, a substantial change was observed in the form: of the static magnetic hysteresis loop: characterized by the so-called "wasp" shape. This result shows that an additional magnetically hard phase had appeared within the sample.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 905-908
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and Magnetic Properties of the Alloys $Fe_{60}Co_{10}W_xMo_{2}Y_{8}B_{20-x}$ (x=0, 1, 2)
Autorzy:
Garus, J.
Garus, S.
Nabiałek, M.
Szota, M.
Powiązania:
https://bibliotekanauki.pl/articles/1375380.pdf
Data publikacji:
2014-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.50.Kj
75.30.Ds
75.20.En
75.47.Np
75.50.Bb
75.60.Ej
Opis:
The aim of this paper were studies of the structure and magnetic properties of the bulk $Fe_{60}Co_{10}W_xMo_{2}Y_{8}B_{20-x}$ (x=0, 1, 2) alloys. Ingots of the alloys were prepared by arc melting of high purity elements in an argon atmosphere. The samples in the form of plates were obtained by a rapid solidification of liquid metal in a copper mold cooled with water. Topography of produced samples were examined using a ZEISS SUPRA 35 high resolution scanning electron microscope. Furthermore, using a vibrating sample magnetometer the magnetization in high magnetic fields was studied. Moreover, from initial magnetization curves the parameters related with the Holstein-Primakoff paraprocess were determined.
Źródło:
Acta Physica Polonica A; 2014, 126, 4; 954-956
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Study of Magnetization in Strong Magnetic Fields for Alloys $Fe_{60}Co_{10}W_xNb_2Y_{8}B_{20-x}$ (x=0, 1)
Autorzy:
Garus, S.
Nabiałek, M.
Błoch, K.
Garus, J.
Powiązania:
https://bibliotekanauki.pl/articles/1375468.pdf
Data publikacji:
2014-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.50.Kj
75.30.Ds
75.20.En
75.47.Np
75.50.Bb
75.60.Ej
Opis:
The study analyzed the influence of structural defects on the process of magnetization in the area called the approach to ferromagnetic saturation for bulk $Fe_{60}Co_{10}W_xNb_2Y_{8}B_{20-x}$ (x=0, 1) alloys. For this purpose, the magnetization studies were performed in the fields range of 0 T to 2 T using a LakeShore vibrating magnetometer. On the basis of the Kronmüller theory an analysis of the magnetization curves was conducted and the type of occurring structural defects in the studied alloys was established. Then, using a Monte Carlo method the effective anisotropy of the tested samples was designated.
Źródło:
Acta Physica Polonica A; 2014, 126, 4; 957-959
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of 1% Addition of Nb and W on the Relaxation Process in Classical Fe-Based Amorphous Alloys
Autorzy:
Pietrusiewicz, P.
Błoch, K.
Nabiałek, M.
Walters, S.
Powiązania:
https://bibliotekanauki.pl/articles/1385746.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.Lr
75.50.-y
75.50.Kj
75.30.Cr
61.43.Dq
76.80.+y
61.05.Qr
75.25.-j
Opis:
This paper features investigations into the influence of small additions of alloying elements on: structure, as well as the temporal and thermal stability of magnetic properties, and the disaccommodation effect, for the following amorphous alloys: Fe₆₁Co₁₀Y₈Me₁B₂₀ (where Me = Nb, W). The structure of the investigated samples has been confirmed by the Mössbauer spectroscopy. The obtained results indicate a strong correlation between the structure and the disaccommodation of the studied alloys. The Mössbauer studies reveal different configurations of atoms in the amorphous alloy samples, and the results indicate various potential barriers between orientations of atom pairs. For this reason, to describe the disaccommodation effect, the distribution of activation energy should be taken into account. The distribution of activation energy has been related to the distribution of relaxation times.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 397-399
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ordering and Magnetoelastic Properties of Fe-Ga Alloy
Autorzy:
Perduta, K.
Olszewski, J.
Busbridge, S.
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1811585.pdf
Data publikacji:
2008-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
75.50.Bb
75.80.+q
81.40.Ef
83.80.Ab
Opis:
In this paper the investigations of the ordering, microstructure and magnetomechanical properties of the $Fe_{80}Ga_{20}$ alloy and its composites are presented. The composites consisted of the Fe-Ga particles with a size distribution in the range between 20 and 50 μm. These particles were produced by blade-milling of arc-melted alloy. After milling the powders were annealed at 723 K for 2.5, 7.5, and 12.5 h. The epoxy-bonded composites in rectangular shape were made from the as-cast as well as from the annealed powders. The Mössbauer spectroscopy studies revealed that the as-cast alloy is completely disordered. After annealing at 723 K the long range atomic order appeared. It was stated that the best magnetoelastic properties were exhibited by composites made from ferromagnetic particles obtained from the as-cast alloy. The measured saturation magnetostriction was $λ_s = 70× 10^{-6}$ for the bulk alloy and $λ_s=100× 10^{-6}$ for composite.
Źródło:
Acta Physica Polonica A; 2008, 114, 6; 1537-1543
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetocaloric Effect in Amorphous and Partially Crystallized Fe-Zr-Nb-Cu-B Alloy
Autorzy:
Gondro, J.
Błoch, K.
Nabiałek, M.
Wallters, S.
Powiązania:
https://bibliotekanauki.pl/articles/1387568.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Sg
75.47.Np
75.50.Bb
75.50.Kj
75.90.+w
87.64.Pj
Opis:
This paper presents the results of an investigation into the: microstructure, magnetic properties and influence of annealing temperature on the magnetocaloric effect of Fe₈₂Zr₇Nb₂Cu₁B₈ alloy in the as-quenched and partially crystalline state. The microstructure was investigated using Mössbauer spectroscopy. The magnetocaloric effect was observed as a change in the magnetic entropy, which was calculated from isothermal magnetization curves. Fully-amorphous Fe₈₂Zr₇Nb₂Cu₁B₈ alloys, in the as-quenched state, exhibit a Curie temperature equal to (340±5) K. The transmission Mössbauer spectrum for the as-quenched Fe₈₂Zr₇Nb₂Cu₁B₈ alloy is typical for weak ferromagnets with the average hyperfine field of 9.86(2) T. For this alloy in the as-quenched state, the changes in maximum magnetic entropy occur near the Curie points and are equal to 0.95 J/(kg K). Also, the maximum magnetic entropy changes decrease after partial crystallization.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 606-607
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Magnetization Reversal Process of High-Remanent $Nd_{10}Fe_{83}Zr_1B_6$ Alloy in the As-Cast State
Autorzy:
Ceglarek, A.
Płusa, D.
Dośpiał, M.
Nabiałek, M.
Pietrusiewicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/1429022.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Et
75.50.Vv
75.50.Ww
75.60.Ej
75.60.Jk
Opis:
In this work the magnetic properties of ribbons with composition of $Nd_{10}Fe_{83}Zr_1B_6$ obtained by using the melt-spinning method were studied. From the X-ray diffraction patterns the phase composition was determined. It was found that investigated alloy was composed of α-Fe and $Nd_2Fe_{14}B$ phases. From the peaks broadening the grain sizes of α-Fe and $Nd_2Fe_{14}B$ phases were estimated as equal to 20 nm and 40 nm, respectively. From the recoil curves the reversible $μ_0$ $M_{rev}$ and irreversible $μ_0 M_{irr}$ parts of magnetization and differential susceptibility $χ_{rev}$ and $χ_{irr}$ were determined as a function of an applied field. From these dependences it was found that the pinning of domain walls at the grain boundaries is the main magnetization reversal process. The interactions between grains were investigated by means of the δ M plot. It was stated that short range exchange interaction between grains of hard and soft phases are dominant and causes the remanence enhancement.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1279-1281
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Low Temperature Annealing on the Magnetic and Structural Properties of $Fe_{61}Co_{10}Y_{8}W_{1}B_{20}$ Alloy
Autorzy:
Pietrusiewicz, P.
Nabiałek, M.
Szota, M.
Dośpiał, M.
Gruszka, K.
Powiązania:
https://bibliotekanauki.pl/articles/1367369.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.-j
61.43.Dq
75.50.Kj
75.60.Ej
81.40.Ef
Opis:
In alloy materials, the onset of crystallization temperature $(T_{x})$ is treated as the threshold of structural stability. In amorphous materials, this threshold is the temperature above which heterogeneous crystalline grains begin to appear. However, in amorphous materials, frozen nuclei of the crystalline grains also come into existence during the production process. These nuclei have a strong influence on the properties of the amorphous materials. The growth of the nuclei of the crystalline grains is possible even below the crystallization temperature, and maintaining control over their size allows the application properties, for example the magnetic properties, to be controlled. In this paper, the influence of two-stage isothermal annealing (below the crystallization temperature) on the structure and magnetic properties of $Fe_{61}Co_{10}Y_{8}W_{1}B_{20}$ alloy was investigated. Samples of the material were prepared in the form of plates, and subjected to thermal treatment at temperatures of 700 K and 770 K, for 1 and 3.5 hours, respectively.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 110-111
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł

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