Thin magnetic multilayered films containing FePt have attracted a lot of attention recently due to their possible usage in ultra-high density magnetic storage. Although structure defects play a dramatic role in the magnetization process and influence magnetic properties in general this dependence have not been studied thoroughly. The main aim of this work was to perform theoretical investigation of the magnetic properties of FePt and Fe/FePt thin films with high coercivity with respect to the structure defects such as anisotropy constant, magnetization saturation, exchange constant fluctuations, and easy axis deviation. For selected defect patterns, the coercive field dependence on layer thicknesses was analysed. Numerical study of the bilayer with hard magnetic layer having the planar anisotropy was carried on using micromagnetic calculations. Values of layers thickness have been found optimal for perspective applications, the dependence of the hysteresis loop shape upon the magnetization process has been shown and analysed.
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7 April 2014
Research Article|
April 07 2014
Influence of the structure defects on the magnetic properties of the FePt/Fe bilayer
E. M. Plotnikova;
E. M. Plotnikova
a)
1
Prokhorov General Physics Institute
, RAS, 38 Vavilov Str., Moscow 119991, Russian Federation
2
Moscow Institute of Physics and Technology State University
, 9 Institutskiy lane, Dolgoprudny, Moscow 141700, Russian Federation
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I. I. Trushkin;
I. I. Trushkin
1
Prokhorov General Physics Institute
, RAS, 38 Vavilov Str., Moscow 119991, Russian Federation
2
Moscow Institute of Physics and Technology State University
, 9 Institutskiy lane, Dolgoprudny, Moscow 141700, Russian Federation
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D. A. Lenkevich;
D. A. Lenkevich
3
Joint Institute for High Temperatures (JIHT)
, RAS, 13 Izhorskaya st. Bd.2, Moscow 125412, Russian Federation
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A. L. Kotelnikov;
A. L. Kotelnikov
3
Joint Institute for High Temperatures (JIHT)
, RAS, 13 Izhorskaya st. Bd.2, Moscow 125412, Russian Federation
4
Istituto P.M.
srl, I-10141, via Grassi, 4, Torino, Italy
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A. Cockburn;
A. Cockburn
5
Institute for Manufacturing, Department of Engineering, University of Cambridge
, 17 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
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K. A. Zvezdin
K. A. Zvezdin
1
Prokhorov General Physics Institute
, RAS, 38 Vavilov Str., Moscow 119991, Russian Federation
4
Istituto P.M.
srl, I-10141, via Grassi, 4, Torino, Italy
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J. Appl. Phys. 115, 134318 (2014)
Article history
Received:
January 10 2014
Accepted:
March 28 2014
Citation
E. M. Plotnikova, I. I. Trushkin, D. A. Lenkevich, A. L. Kotelnikov, A. Cockburn, K. A. Zvezdin; Influence of the structure defects on the magnetic properties of the FePt/Fe bilayer. J. Appl. Phys. 7 April 2014; 115 (13): 134318. https://doi.org/10.1063/1.4870866
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