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Tytuł:
Element Specific Magnetometry Combining X-ray Circular with Linear Dichroism: Fundamentals and Applications
Autorzy:
Kowalik, I.
Powiązania:
https://bibliotekanauki.pl/articles/1399311.pdf
Data publikacji:
2015-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Dm
78.20.Ls
75.50.Pp
75.50.Tt
Opis:
This article gives an overview of the use of X-ray absorption spectroscopy to characterize the magnetic properties for technologically important, low dimensional magnetic materials. An overview is given both for the experimental hardware, the measurements and the analysis of the spectra. The information obtained is discussed for metallic and semiconducting systems, using both the X-ray magnetic circular dichroism and the X-ray linear magnetic dichroism spectroscopy.
Źródło:
Acta Physica Polonica A; 2015, 127, 3; 831-849
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interference Effects in T-MOKE Spectra of Fe Thin Films at the 3p Edges - Theory and Experiment
Autorzy:
Legut, D.
Tesch, M.
Oppeneer, P.
Mertins, H.
Jansing, Ch.
Gilbert, M.
Gaupp, A.
Bürgler, D.
Schneider, C.
Powiązania:
https://bibliotekanauki.pl/articles/1386641.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
78.20.Ls
78.70.Ck
74.20.Pq
Opis:
We present combined first-principle calculations and experimental results of the transversal magneto-optical Kerr effect (T-MOKE) of thin Fe films across the 3p edges using linearly polarized synchrotron radiation. We show that the experimental T-MOKE spectra at the 3p edges of Fe exhibit clear signals that are strongly influenced by interference effects. Ab initio calculated T-MOKE asymmetry spectra confirm the importance of interference effects. The comparison of experimental with calculated spectra reveals some differences that we attribute to metal/metal interface roughness that is not taken into account in the calculations.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 466-468
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-Ray Magnetic Circular Dichroism Studies on $CeNi_4B$
Autorzy:
Toliński, T.
Cezar, J.
Wende, H.
Kowalczyk, A.
Baberschke, K.
Powiązania:
https://bibliotekanauki.pl/articles/1810402.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Lp
75.20.Hr
78.70.Dm
79.60.-i
78.20.Ls
Opis:
The $CeNi_4B$ compound is a mixed-valence system. It is a paramagnet with $μ_\text{eff}$= 0.52 $μ_{B}$/f.u. and the paramagnetic Curie temperature θ= -10.7 K. In the present research we complete our previous magnetic susceptibility and X-ray photoemission measurements with new studies by the X-ray magnetic circular dichroism method. The observation of the Ce $M_{4,5}$ edges carried out with X-ray magnetic circular dichroism confirms the mixed-valence state deduced previously from X-ray photoemission spectroscopy. Moreover, we report on the measurements of the Ni $L_{2,3}$ edges, which enable verification of the Ni contribution to the magnetism of this compound.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 129-131
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weak Ferromagnetism of Fe Intercalated Fullerides
Autorzy:
Byszewski, P.
Diduszko, R.
Baran, M.
Powiązania:
https://bibliotekanauki.pl/articles/1929859.pdf
Data publikacji:
1994-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Ls
76.70.Hb
78.55.Kz
Opis:
The magnetic properties of C$\text{}_{60}$Fe$\text{}_{x}$ resemble spin glass with the freezing onset above 200 K. The unusual magnetization behavior at intermediate temperatures is ascribed to bonds reorganization.
Źródło:
Acta Physica Polonica A; 1994, 85, 2; 297-302
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exchange Parameters of CdCrS Semimagnetic Semiconductor
Autorzy:
Herbich, M.
Mac, W.
Twardowski, A.
Ando, K.
Demianiuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/1968099.pdf
Data publikacji:
1997-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Ls
71.70.Gm
78.30.Fs
Opis:
Free exciton magnetoreflectance and magnetization of Cd$\text{}_{1-x}$Cr$\text{}_{x}$S (0.0024 < x < 0.0031) were measured at T = 2.0 K and magnetic field up to 5 T. Combining the heavy hole exciton splitting with the magnetization data the exchange integral N$\text{}_{0}$β = +0.46±0.04 eV was evaluated within the framework of mean field approximation.
Źródło:
Acta Physica Polonica A; 1997, 92, 4; 774-776
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Infrared Spectroscopy of GaAs Doped with Mn
Autorzy:
Rutkowska, A.
Wasik, D.
Witowski, A.
Sadowski, M.
Orłowski, W.
Strzelecka, G.
Hruban, A.
Kamińska, M.
Twardowski, A.
Potemski, M.
Powiązania:
https://bibliotekanauki.pl/articles/2044531.pdf
Data publikacji:
2005-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.70.Ej
78.20.Ls
78.30.Fs
Opis:
We found that the fine structure related to Lyman spectra of [Mn$\text{}^{2+}$(d$\text{}^{5}$) + a hole] centers in GaAs was present only for samples with low Mn concentration. Such samples, at low temperature, did not show any hopping conductance within Mn impurity band. Magnetooptical measurements revealed that magnetic field induced splitting of the Lyman optical transitions was larger than Zeeman splitting observed for typical shallow acceptors in GaAs, like Be, Zn, and C. This experimental result proved that in the case of Mn acceptor impurity, the exchange coupling of a hole and the S = 5/2 Mn$\text{}^{2+}$(d$\text{}^{5}$) core could not be neglected, which was in accordance with the [Mn$\text{}^{2+}$(d$\text{}^{5}$) + a hole] model of the neutral Mn center in GaAs.
Źródło:
Acta Physica Polonica A; 2005, 108, 5; 845-849
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetoresistance and Electroluminescence near the Curie-Weiss Temperature in the $Zn_{1-x}Mn_{x}Te$ Light Emitting Devices
Autorzy:
Van Khoi, Le
Avdonin, A.
Szymczak, R.
Gałązka, R.
Potemski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1791358.pdf
Data publikacji:
2009-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.70.Gm
71.70.Ej
75.50.Pp
78.20.Ls
78.60.Fi
Opis:
The light emitting devices based on the $p-Zn_{1-x}Mn_{x}Te$ bicrystals have been fabricated. The $Zn_{1-x}Mn_{x}Te$ devices produce red and green emission originating from the internal d-shell transitions in the $Mn^{2+}$ ions and the donor-acceptor pairs recombination, respectively. A critical behavior of the magnetic field dependence of the green emission intensity and a positive magnetoresistance near the Curie-Weiss temperature in the $Zn_{1-x}Mn_{x}Te$ devices was observed.
Źródło:
Acta Physica Polonica A; 2009, 116, 5; 941-943
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
s,p-d Exchange Constants of ZnFeTe Diluted Magnetic Semiconductor
Autorzy:
Mac, W.
Herbich, M.
Nguyen, The Khoi
Twardowski, A.
Shapira, Y.
Demianiuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/1933919.pdf
Data publikacji:
1995-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Ls
71.70.Gm
Opis:
Reflectance and degree of polarization of reflectance of the free exciton in Zn$\text{}_{1-x}$Fe$\text{}_{x}$Te (x ≈ 0.002) was measured at T = 1.9 K and magnetic field up to 5 T. Combining the exciton splitting with the magnetization data we estimated the exchange constant N$\text{}_{0}$(α-β) = 2.1 eV.
Źródło:
Acta Physica Polonica A; 1995, 88, 5; 845-848
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magneto-Optical and Optical Investigation of the Surface Region of Ion implanted Garnet Films
Autorzy:
Lali, Kalandadze
Powiązania:
https://bibliotekanauki.pl/articles/1387379.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Cn
78.20.Ls
Opis:
In the present work we have shown the efficiency of complex investigation of the ion implanted garnet surface region by magneto-optical and optical methods. We have investigated the optical and magneto-optical properties of the ion-implanted (YBiCaSm)₃(FeGeSi)₅O₁₂ garnet films. It has shown that ion implantation influences significantly the magneto-optical properties of the garnet films and practically does not change its optical characteristics. We have also determined the spectral dependences of the component of the tensor of dielectric permittivity for the surface of ion implanted (YBiCaSm)₃(FeGeSi)₅O₁₂ ferrite-garnet films before and after implantation process. These calculations let us evaluate the influence of implantation on an electronic energy structure of the surface layer for the sample.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 582-584
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magneto-Optical Study of NiFe/Au/Co/Au Layers
Autorzy:
Mazalski, P.
Postava, K.
Tekielak, M.
Maziewski, A.
Urbaniak, M.
Szymański, B.
Stobiecki, F.
Powiązania:
https://bibliotekanauki.pl/articles/1810594.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.-d
75.70.-i
75.70.Ak
78.20.Ls
Opis:
Sputtered NiFe/Au/Co/Au layers with noncollinear magnetizations are of scientific interest for unusual magnetization behavior and their potential application in spintronics. In this paper, we propose to use a material selective sensitivity of magneto-optical Kerr effect for separation of signals from different materials in a bilayer system. The materials selective sensitivity is demonstrated on a sample with two mutually perpendicular Co and NiFe wedges.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 369-371
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantum Size Effects in Ultrathin Layered Magnetic Systems
Autorzy:
Bruno, P.
Powiązania:
https://bibliotekanauki.pl/articles/1953153.pdf
Data publikacji:
1997-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Cn
75.30.Et
78.20.Ls
75.70.-i
Opis:
The effect of electron confinement in ultrathin layered magnetic systems is discussed. This leads to quantum size effects which can be observed by photoemission in overlayers. In magnetic multilayers, spectacular oscillatory behavior of the interlayer exchange coupling results from the electron confinement. The quantum size effects manifest themselves also in the magneto-optical properties of ultrathin films.
Źródło:
Acta Physica Polonica A; 1997, 91, 1; 37-54
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exchange Coupled Double Layers for Magneto-Optical Applications
Autorzy:
Becker, S.
Rohrmann, H.
Roell, K.
Stobiecki, F.
Powiązania:
https://bibliotekanauki.pl/articles/1953155.pdf
Data publikacji:
1997-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Ch
42.79.Vb
78.20.Ls
75.70.-i
Opis:
Optical data storage is a rapidly developing technique, which emerges in many varieties. Magneto-optical recording, in particular, applies amorphous rare earth/transition metal films, where a binary coded information is written thermomagnetically and is read by the magneto-optical Kerr or Faraday effect. To increase the writing speed and the recording density, techniques for direct overwrite and magnetically induced superresolution were proposed, which involve these of exchange coupled double layer systems as a storage media. In this paper, the principles and the properties of exchange coupled double layers are discussed with respect to the direct overwrite and the magnetically induced superresolution processes. A formalism based on a switching field diagram is developed yielding all information necessary to achieve reliable and practical writing procedures. As an example, the direct overwrite capability is demonstrated experimentally in antiparallel coupled layer systems.
Źródło:
Acta Physica Polonica A; 1997, 91, 1; 55-65
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magneto-Optic Periodic Strip Structures
Autorzy:
Ciprian, D.
Pištora, J.
Powiązania:
https://bibliotekanauki.pl/articles/2014935.pdf
Data publikacji:
2001-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.25.Fx
78.20.Ls
75.70.-i
Opis:
The paper deals with the optical response from periodic lamellar magnetic structure consisting of permalloy strips on Si substrate covered by Cr protection layer. The ultrathin structure is magnetized in polar geometry and the spectral dependence of magneto-optic response is computed using rigorous coupled wave analysis. The results are compared with the data obtained from magneto-optical ellipsometry experiments. Further model computation helps to understand the basic features of the Kerr rotation spectra and reveal the possible reason of deviation between the experimental data and the model computation.
Źródło:
Acta Physica Polonica A; 2001, 99, 1; 33-46
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanism of Optical Detection of Magnetic Resonance in Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te
Autorzy:
Godlewski, M.
Surma, M.
Gałązka, R. R.
Nguyen, The Khoi
Gisbergen, S.J.C.H.M.
Gregorkiewicz, T.
Ammerlaan, C. A. J.
Powiązania:
https://bibliotekanauki.pl/articles/1921620.pdf
Data publikacji:
1992-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.70.Hb
75.50.Pp
78.20.Ls
Opis:
The photoluminescence and optically detected magnetic resonance studies of Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te (x = 0.095) are presented. The Mn$\text{}^{2+}$ magnetic resonance is detected optically via the changes of "edge" emission induced by the decrease of the Mn spin system magnetization.
Źródło:
Acta Physica Polonica A; 1992, 82, 4; 717-719
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Beyond the Virtual Crystal Approximation in Diluted Magnetic Semiconductors
Autorzy:
Tworzydło, J.
Powiązania:
https://bibliotekanauki.pl/articles/1873004.pdf
Data publikacji:
1995-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.70.Gm
78.20.Ls
71.55.Gs
Opis:
We present a new model approach which goes beyond the virtual crystal approximation and the molecular field approximation in the description of the spin splitting of band states in diluted magnetic semiconductors. The theory is formulated within a one-band effective mass approximation and explicitly takes into account a chemical and magnetic disorder caused by substitutional ions. The results confirm the apparent dependence of the p-d exchange integral on x in Cd$\text{}_{1-x}$Mn$\text{}_{x}$S for small concentrations of Mn ions and we predict the asymmetric field and temperature dependence of the spin splitting in this compound.
Źródło:
Acta Physica Polonica A; 1995, 87, 2; 391-394
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł

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