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Low Temperature Properties of Inhomogeneous Magnetic Multilayers

100%
Urbaniak-Kucharczyk A.
Acta Physica Polonica A
|
2015
|
vol. 127
|
issue 2
543-545
EN
System of two magnetic layers with nonuniform distribution of anisotropy parameter and exchange coupled by nonmagnetic spacer is studied by means of the Green function approach. Our attention is focussed on the elementary excitations and low temperature magnetisation behavior. The spin wave parameter B in the Bloch law T^{3/2} is found as an oscillatory function of a spacer thickness. The effects of damping leading to non-zero line-width of ferromagnetic resonance peaks are also taken into account. As a result the dependence of resonance line-width on parameters characterizing system under consideration is obtained for the case of uniform anisotropy parameter and for quadratic distribution of this parameter in magnetic layers, respectively.
2
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Spin Wave Characteristics of Inhomogeneous Ferromagnetic Layered Composites

100%
Urbaniak-Kucharczyk A.
Acta Physica Polonica A
|
2017
|
vol. 131
|
issue 4
854-856
EN
A ferromagnetic layered composite ABAB...ABA with nonuniform distribution of anisotropy parameter is studied. The effects of damping leading to non-zero line-width of ferromagnetic resonance peaks are also taken into account. As a result the dependence of spin wave parameter B and resonance line-width on parameters characterizing system under consideration were obtained for the case of uniform anisotropy parameter and for quadratic distribution of this parameter in magnetic layers, respectively.
3
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Low Temperature Magnetic Properties of Ferromagnetic Layered Composites

100%
Urbaniak-Kucharczyk A.
Acta Physica Polonica A
|
2014
|
vol. 126
|
issue 1
208-209
EN
A ferromagnetic layered composite ABAB....ABA is studied by means of Green function approach. Our attention is focused on the elementary excitations and low temperature magnetisation behavior. In the presented paper we take also into account the effects of damping due spin-spin interaction. As a result not only the positions and relative intensities of resonance peaks are obtained, but also the resonance line-width is found. On the basis of Green function method the temperature dependence of magnetization of a ferromagnetic layered composite is calculated and the spin wave parameter B in the Bloch's law T^{3/2} is found and presented in dependence of parameters characterizing the system under consideration.
4
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Magnetic Characteristics of the System of Exchange Coupled Layers

63%
Urbaniak-Kucharczyk A., Machowski S.
Acta Physica Polonica A
|
2000
|
vol. 97
|
issue 3
543-546
EN
Using the Green function method it is shown that the deviation of the Curie temperature from its value calculated for continuous layers is related to the absolute value of the interlayer coupling parameter. The dependence of spin wave stiffness parameter on the interlayer exchange coupling is also found.
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