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Tytuł:
Temperature Dependence of Magnetization Process in Bistable Amorphous and Nanocrystalline FeCoMoB Microwires
Autorzy:
Klein, P.
Varga, R.
Vazquez, M.
Powiązania:
https://bibliotekanauki.pl/articles/1534024.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Ej
75.60.Jk
Opis:
We have studied the effect of thermal treatment on the magnetic properties of amorphous and nanocrystalline $Fe_{40}Co_{38}Mo_4B_{18}$ microwires. The magnetization process was measured within the temperature interval from 80 to 425 K. Microwires shows complex temperature dependence of the switching field in amorphous state due to the presence of complex stress distribution induced during production. After nanocrystallization, the switching field depends linearly on the measuring temperature that makes such microwires ideal for sensing applications.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 809-810
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Dependence of the Switching Field in Nanocrystalline FeNiMoB Microwires
Autorzy:
Klein, P.
Varga, R.
Vazquez, M.
Powiązania:
https://bibliotekanauki.pl/articles/1366629.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Ej
75.60.Jk
Opis:
We have studied temperature dependencies of the switching field in as-cast and nanocrystalline glass-coated $Fe_{40}Ni_{38}Mo_{4}B_{18}$ microwires. The switching field shows complex temperature dependence in the as-cast state reflecting the complex stress distribution induced during annealing. The temperature dependence of the switching field depends strongly on the stage of nanocrystallization being negative for low temperatures of annealing and positive for annealing at 700 K.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 64-65
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Complex Magnetoimpedance in Joule-Heated $Co_{71,1}Fe_{3,9}Si_{10}B_{15}$ Microwires
Autorzy:
Komova, E.
Kozar, J.
Klein, P.
Varga, R.
Powiązania:
https://bibliotekanauki.pl/articles/1398258.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
81.07.Bc
75.47.De
Opis:
Complex magnetoimpedance study is an alternating current technique that can be used to probe some properties of magnetic materials. We report on complex impedance measurements in low-negative magnetostrictive ferromagnetic CoFeSiB microwire. In these wires, the domain structure consists of two parts: an inner core, with domains oriented to the longitudinal direction of the wire, and an outer shell with circumferentially oriented domains. This magnetic structure is modified by AC current flowing through the microwire which produces an additional circumferential magnetic field $H_Φ$ and significantly affects magnetic structure inside the wires. The additional circular magnetization process in wires was studied by impedance measurements as a function of the amplitude and the frequency of the AC current after gradual Joule heating. Changes in the magnetization processes are reflected in the real permeability values and loss factor values.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 705-707
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of Glass-Coated FeWB Microwires
Autorzy:
Klein, P.
Varga, R.
El Kammouni, R.
Vazquez, M.
Powiązania:
https://bibliotekanauki.pl/articles/1367044.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Ej
Opis:
We have studied magnetization process in amorphous bistable $Fe_{80}W_{3}B_{17 }$ microwires with reduced Curie temperature. High mechanical stresses from glass-coating, induced during production process, result in high switching field. Reducing the length of microwire, the switching field decreases as a result of reduction of magnetoelastic anisotropy. Moreover, the decrease of magnetoelastic anisotropy results in a complex temperature dependence of the switching field. On the other hand, strong variations of the switching field with temperature can be employed in miniaturised temperature sensor.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 70-71
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GMI Effect in Annealed $Fe_{40}Ni_{38}Mo_{4}B_{18}$ Microwires
Autorzy:
Komova, E.
Šidik, F.
Klein, P.
Varga, R.
Vazquez, M.
Powiązania:
https://bibliotekanauki.pl/articles/1367050.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
81.07.Bc
75.47.De
Opis:
Amorphous glass-coated microwires are ideal material for miniaturized applications for sensing the temperature, stress and magnetic field. One of the key parameters for future applications is their time and thermal stability. It has been shown that stability can be improved by using nanocrystalline materials that combine good soft magnetic properties of amorphous matrix with high structural stability of crystalline grains. Such nanocrystalline materials are usually obtained by annealing of amorphous precursor. In the given contribution, the influence of dc current annealing on the domain structure and GMI effect in amorphous and nanocrystalline $Fe_{40}Ni_{38}Mo_{4}B_{18}$ magnetic microwire has been studied. The annealing induces additional circular magnetic anisotropy, stress relief and structure homogenization. However, the increase of magnetostriction results in the decrease of GMI. Annealing at optimum crystallisation temperature results in an increase of the relative permeability due to the formation of the nanosized grains. Consequently, GMI amplitude is comparable to that of as-cast state.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 74-75
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Current Annealing on Domain Structure in Amorphous and Nanocrystalline FeCoMoB Microwires
Autorzy:
Klein, P.
Varga, R.
Onufer, J.
Ziman, J.
Badini-Confalonieri, G.
Vazquez, M.
Powiązania:
https://bibliotekanauki.pl/articles/1032776.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Ej
75.60.Jk
75.70.Kw
75.60.Ch
Opis:
The influence of current annealing on the complex domain structure in amorphous and nanocrystalline FeCoMoB microwire has been studied. The thickness of radial domain structure together with the switching field of single domain wall change as a consequence of variation of complex internal stress distribution inside metallic core. Firstly, radial domain structure thickness monotonously increases with increasing annealing DC current density for amorphous state. Switching field exhibits local minimum in nanocrystalline sample annealed at 500 MA/m^2 for 10 min when the lowest thickness of outer shell (182 nm) was observed. Such annealed sample (which magnetic properties exhibit excellent temperature stability) is suitable candidate for miniaturized sensor construction for sensing the magnetic field or mechanical stress.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 681-683
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of the Fixation Patterns on Magnetic Characteristics of Amorphous Glass-Coated Sensoric Microwires
Autorzy:
Hudak, R.
Varga, R.
Hudak, J.
Praslicka, D.
Blazek, J.
Polacek, I.
Klein, P.
Powiązania:
https://bibliotekanauki.pl/articles/1202355.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.85.G-
87.85.fk
85.70.Ay
Opis:
Some of the frequent reasons of titanium implant failures in human body are incorrect biomechanical interactions within the tissue-implant interface and inflammatory processes arising around the implant's application area. For both processes, it is crucial to locate them and intervene in time. One of the monitoring possibilities of the mentioned processes is the application of amorphous glass-coated sensoric microwires (AGCSM). Magnetic characteristics of these microwires are influenced by both mechanical tension (magnetoelastic interaction of the magnetic moment with mechanical stress) and by temperature (different coefficient of thermal expansion of the metal core and glass coating). The key task, in order to change the magnetic characteristics of AGCSM from both clinical and scanning point of view, appears to be the fixation pattern of AGCSM in the implant's body. The presented study shows the impact of four types of AGCSM fixation patterns (at one ending, at both endings, in the middle and along the entire length) on the thermal response process tested in laboratory conditions. The obtained results will enable to establish the AGCSM fixation methodology in the implant's body in order to achieve optimal output temperature parameters form the implant and the tissue-implant interface by magnetic contactless measurements.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 417-418
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel Applications of Bistable Magnetic Microwires
Autorzy:
Sabol, R.
Klein, P.
Ryba, T.
Hvizdos, L.
Varga, R.
Rovnak, M.
Sulla, I.
Mudronova, D.
Galik, J.
Polacek, I.
Zivcak, J.
Hudak, R.
Powiązania:
https://bibliotekanauki.pl/articles/1032633.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Jk
Opis:
Few examples of technical and biomedical applications of bistable magnetic microwires are shown. Particularly, application of microwires in civil engineering are shown for sensing the mechanical stress in concrete, steel structure or steel cable by simple gluing it on the surface of studied structure. On the other hand, biomedical applications for sensing the stress, temperature, and position inside the human or animal body are shown. Experiments with pig intestine cells points to the biocompatibility of glass coated microwires.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 1150-1152
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new species of the sauropsid reptile Nothosaurus from the Lower Muschelkalk of the western Germanic Basin, Winterswijk, The Netherlands
Autorzy:
Klein, N.
Albers, P.C.H.
Powiązania:
https://bibliotekanauki.pl/articles/22006.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
new species
sauropsid reptile
Nothosaurus
Lower Muschelkalk
Germanic Basin
Winterswijk town
Netherlands,The
paleobiology
Sauropterygia
ontogenesis
Opis:
A nothosaur skull recently discovered from the Lower Muschelkalk (early Anisian) locality of Winterswijk, The Netherlands, represents at only 46 mm in length the smallest nothosaur skull known today. It resembles largely the skull morphology of Nothosaurus marchicus. Differences concern beside the size, the straight rectangular and relative broad parietals, the short posterior extent of the maxilla, the skull proportions, and the overall low number of maxillary teeth. In spite of its small size, the skull can not unequivocally be interpreted as juvenile. It shows fused premaxillae, nasals, frontals, and parietals, a nearly co−ossified jugal, and fully developed braincase elements, such as a basisphenoid and massive epipterygoids. Adding the specimen to an existing phylogenetic analysis shows that it should be assigned to a new species, Nothosaurus winkelhorsti sp. nov., at least until its juvenile status can be unequivocally verified. Nothosaurus winkelhorsti sp. nov. represents, together with Nothosaurus juvenilis, the most basal nothosaur, so far.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Globalizing production networks
Globalizujące sieci produkcji
Autorzy:
Klein, O.
Pachura, P.
Tamasy, C.
Powiązania:
https://bibliotekanauki.pl/articles/405049.pdf
Data publikacji:
2016
Wydawca:
Politechnika Częstochowska
Tematy:
global commodity chains
global value chains
global production networks
FDI
transdisciplinarity
interdyscyplinarność
Opis:
The emergence of globalization processes and transnational market integration has become a more and more challenging issue for scientific research in many fields, also and in particular within management science. Against this background the paper presents conceptualizations of globalizing networks based on theories and approaches such Global Commodity Chains, Global Value Chains and Global Production Networks. In particular, the paper aims to conceptualize and discuss globalizing networks with a specific focus on foreign direct investments (FDI) and special economic zones (SEZs). The article is based on heuristic approach and in-depth literature study. The text has been prepared based on heuristic approach and literature studies and it can make a small contribution to the conceptualization within in management science theory.
Postępująca globalizacja w połączeniu z wzrastającymi zjawiskami sieciowania stają się coraz większym wyzwaniem dla badań naukowych w wielu dziedzinach. W niniejszym artykule przedstawiono konceptualizację globalizujących się sieci opartą na teorii, Global Commodity Chains, Global Value Chains and Global Production Networks. Celem artykułu jest przyczynek do konceptualizacji tych zjawisk i kontynuacja dyskusji naukowej na temat roli globalizacji sieci w globalnym środowisku gospodarczym. Ponadto artykuł odwołuje się do znaczenia FDI oraz specjalnych stref ekonomicznych w procesie globalizacji sieci produkcyjnych. Tekst został opracowany na podstawie podejść heurystycznych oraz studiów literaturowych.
Źródło:
Polish Journal of Management Studies; 2016, 13, 2; 81-89
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pyrolysis of biomass and refuse-derived fuel performance in laboratory scale batch reactor
Autorzy:
Kluska, J.
Klein, M.
Kazimierski, P.
Kardaś, D.
Powiązania:
https://bibliotekanauki.pl/articles/240079.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
slow pyrolysis
fast pyrolysis
oil
refuse derived fuel
powolna piroliza
szybka piroliza
olej
paliwo z odpadów
Opis:
The results of pyrolysis of pine chips and refuse derived fuel fractions are presented. The experiments were carried out in a pilot pyrolysis reactor. The feedstock was analyzed by an elemental analyzer and the X-ray fluorescence spectrometer to determine the elemental composition. To find out optimum conditions for pyrolysis and mass loss as a function of temperature the thermogravimetric analysis was applied. Gases from the thermogravimetric analysis were directed to the infrared spectrometer using gas-flow cuvette to online analysis of gas composition. Chemical composition of the produced gas was measured using gas chromatography with a thermal conductivity detector and a flame ionization detector. The product analysis also took into account the mass balance of individual products.
Źródło:
Archives of Thermodynamics; 2014, 35, 1; 141-152
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two-Gap Superconductivity in $2H-NbS_2$
Autorzy:
Pribulová, Z.
Leroux, M.
Kačmarčík, J.
Marcenat, C.
Klein, T.
Rodière, P.
Cario, L.
Samuely, P.
Powiązania:
https://bibliotekanauki.pl/articles/1535279.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.25.Bt
74.70.Ad
Opis:
We performed specific heat measurements of the superconducting single crystal of $2H-NbS_2$ in the temperature range down to 0.6 K and magnetic fields up to 14 T. The temperature and magnetic field dependence of the electronic specific heat consistently indicate existence of two superconducting energy gaps in the system. The superconducting anisotropy depends on both temperature and magnetic field. Moreover, the angular dependence of the upper critical field deviates from the Ginzburg-Landau behavior and rather reminds that of $MgB_2$. All these features point to a multigap superconductivity in $2H-NbS_2$. Our measurements are in a perfect agreement with the previous scanning tunneling spectroscopy of Guillamón et al.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 1024-1025
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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