Temat: 75.70.Cn - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Interlayer Exchange Coupling: Effect of Alloying
Autorzy:: Kudrnovský, J.
Drchal, V.
Turek, I.
Šob, M.
Weinberger, P.
Powiązania:: https://bibliotekanauki.pl/articles/1952837.pdf
Data publikacji:: 1997-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.70.Cn
75.30.Et
Opis:: The effect of disorder in magnetic layers, in the spacer, and at interfaces between them on periods, amplitudes, and phases of oscillations of interlayer exchange coupling in magnetic multilayers is studied theoretically on the ab initio level. We employ the spin-polarized surface Green function technique within the tight-binding linear muffin-tin orbital method and the Lloyd formulation of the interlayer exchange coupling. The coherent potential approximation is used to describe the effect of alloying. The calculations are significantly simplified by employing the vertex-cancellation theorem. Numerical results illustrating the effect of various kinds of disorder in the system on the properties of the interlayer exchange coupling are presented.
Źródło:: Acta Physica Polonica A; 1997, 91, 1; 15-25
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of Temperature on Magnetic Properties of $Tb_{26}Co_{74}$/Co/$Fe_{20}Ni_{80}$ Films with Exchange Bias
Autorzy:: Balymov, K.
Kulesh, N.
Stepanova, E.
Vas'kovskiy, V.
Svalov, A.
Powiązania:: https://bibliotekanauki.pl/articles/1377823.pdf
Data publikacji:: 2014-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.70.-i
75.30.Et
75.70.Cn
Opis:: Influence of temperature on magnetization process was investigated in exchange coupled $Tb_{26}Co_{74}$/Co/$Fe_{20}Ni_{80}$ films. Temperature dependences of exchange bias field and coercivity of the $Fe_{20}Ni_{80}$ layer were obtained for films with various thicknesses of the Co spacer. The results obtained were interpreted in terms of changes of magnetic interface localization.
Źródło:: Acta Physica Polonica A; 2014, 126, 6; 1312-1314
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Experiments on Interlayer Exchange Coupling
Autorzy:: Grünberg, P.
Schaefer, M.
Takanashi, K.
Rücker, U.
Nassar, J.
Mertig, I.
Powiązania:: https://bibliotekanauki.pl/articles/1952836.pdf
Data publikacji:: 1997-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.70.Cn
75.30.Et
75.70.-i
Opis:: The results of various experiments on interlayer exchange coupling will be reviewed. After a general discussion of the theoretical understanding we deal first with 90°-type coupling and show that two mechanisms proposed by Slonczewski can explain our measured data. We furthermore study the coupling of Fe films across Cu$\text{}_{x}$Au$\text{}_{1-x}$ alloys. For the composition with x=0.5, the coupling strength strongly increases with annealing. We believe that this is due to an order-disorder structural transformation in the Cu$\text{}_{x}$Au$\text{}_{1-x}$ alloy. Finally, we present results on epitaxially grown bilayers Fe/EuS(100) and trilayers Fe/EuS/Fe(100). In the latter at room temperature we observe a strong decrease in the coupling strength as a function of the interlayer thickness, with a characteristic length of about 0.1 nm. At low temperatures in the bilayer we find an antiferromagnetic coupling between Fe and the adjacent ferromagnetic EuS.
Źródło:: Acta Physica Polonica A; 1997, 91, 1; 7-14
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of the Interface Quality on Magnetic Properties of Fe₂₀Ni₈₀/Tb-Co Films with Unidirectional Anisotropy
Autorzy:: Kulesh, N.
Balymov, K.
Vas'kovskiy, V.
Powiązania:: https://bibliotekanauki.pl/articles/1386982.pdf
Data publikacji:: 2015-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.70.Cn
75.30.Et
68.49.Uv
Opis:: Influence of annealing on hysteresis properties of the soft magnetic layer in Fe₂₀Ni₈₀/Tb₂₆Co₇₄ and Fe₂₀Ni₈₀/Ti/Tb₂₆Co₇₄ films with unidirectional anisotropy was investigated. Modification of the interface by introduction of the ultrathin Ti spacer was demonstrated to improve stability of coercivity and exchange bias field. According to our assumption, the Ti spacer can act as a barrier preventing a thermally-induced diffusion between the magnetic layers. In order to verify this point grazing incidence X-ray fluorescent analysis was used. Comparison of two sets of data attributed to the samples with and without Ti spacer at different stages of annealing revealed decrease of the angular shift between Co and Ni dependences even after annealing at 70°C for Fe₂₀Ni₈₀/Tb₂₆Co₇₄ and absent of any changes up to 300°C for the Fe₂₀Ni₈₀/Ti/Tb₂₆Co₇₄ film. These results can be interpreted as an evidence of the low-temperature interface modification in form of diffusion-like process in the samples without Ti spacer.
Źródło:: Acta Physica Polonica A; 2015, 127, 2; 525-527
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Fabrication and Electrical Characterization of PbS-EuS Ferromagnetic Semiconductor Microstructures
Autorzy:: Wrotek, S.
Morawski, A.
Tkaczyk, Z.
Mąkosa, A.
Wosiński, T.
Dybko, K.
Łusakowska, E.
Story, T.
Sipatov, A. Yu.
Pécz, B.
Grasza, K.
Szczerbakow, A.
Wróbel, J.
Powiązania:: https://bibliotekanauki.pl/articles/2038135.pdf
Data publikacji:: 2004-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.61.Le
75.30.Et
75.70.Cn
Opis:: Current-voltage characteristics and temperature dependence of differential conductance were studied in lithographically patterned (lateral dimensions from 10 x 10 μm$\text{}^{2}$ to 100 x 100 μm$\text{}^{2}$) ferromagnetic EuS-PbS-EuS microstructures. Below the ferromagnetic transition temperature a 4% decrease in the structure conductance was observed for mutual antiferromagnetic orientation of magnetization vectors of ferromagnetic EuS layers.
Źródło:: Acta Physica Polonica A; 2004, 105, 6; 615-620
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

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

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Skocz do pozycji: 7.

Tytuł:: Exchange Coupled NiFe/NiMn Bilayer Studied by a Vector Network Analyzer Ferromagnetic Resonance
Autorzy:: Głowiński, H.
Załęski, K.
Sprada, J.
Dubowik, J.
Powiązania:: https://bibliotekanauki.pl/articles/1427432.pdf
Data publikacji:: 2012-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.70.-i
75.30.Et
75.30.Gw
75.70.Cn
76.50.+g
Opis:: Using cavity ferromagnetic resonance and vector network analyzer ferromagnetic resonance unidirectional, uniaxial and rotatable anisotropies were determined in permalloy(30 nm)/NiMn(56 nm). Resonance field dependence on in-plane angle clearly shows unidirectional and uniaxial anisotropy. Rotatable anisotropy, which acts as internal magnetic field independent of a direction of external magnetic field, is observed on vector network analyzer ferromagnetic resonance as upward shift of the resonance frequency of Py/NiMn compared to Py film. Even for a small exchange bias field, this shift is significantly large.
Źródło:: Acta Physica Polonica A; 2012, 121, 5-6; 1145-1147
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Ferromagnetic Resonance Study of Exchange Coupled (Ga,Mn)As/GaAs/(Ga,Mn)As Heterostructures
Autorzy:: Dziatkowski, K.
Ge, Z.
Liu, X.
Furdyna, J. K.
Clerjaud, B.
Twardowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/2047381.pdf
Data publikacji:: 2007-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Pp
76.50.+g
75.70.Cn
75.30.Et
85.75.-d
Opis:: Ferromagnetic resonance study of the exchange coupled (Ga,Mn)As/ GaAs/(Ga,Mn)As heterostructures is reported. The measurements were performed on the series of samples with varying thicknesses d$\text{}_{GaAs}$ of nonmagnetic GaAs spacer, established d$\text{}_{GaAs}$-dependent extent of weak and strong interlayer exchange coupling, judging on the observation of one or two ferromagnetic resonance modes.
Źródło:: Acta Physica Polonica A; 2007, 112, 2; 227-232
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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