Effects of annealing temperature, atomic composition, film thickness on structure and magnetic properties of CoPt composite films

被引：19

作者：

Zhang, Y. J. ^{[1
,2
]}

Yang, Y. T. ^{[1
,2
]}

Liu, Y. ^{[1
,2
]}

Wang, Y. X. ^{[1
,2
]}

Li, X. Y. ^{[1
,2
]}

Wang, D. D. ^{[3
]}

Cao, J. ^{[3
]}

Yang, N. N. ^{[1
,2
]}

Li, J. ^{[1
,2
]}

Yang, S. Y. ^{[1
,2
]}

Liu, Y. Q. ^{[1
,2
]}

Wei, M. B. ^{[1
,2
]}

Yang, J. H. ^{[1
,2
]}

机构：

[1] Jilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R China

[2] Jilin Normal Univ, Minist Educ, Key Lab Funct Mat Phys & Chem, Siping 136000, Peoples R China

[3] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Key Lab Excited State Proc, Changchun 130033, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 02期

关键词：

L1(0) phase; Phase transformation; Magnetization reversal mechanism; FEPT NANOPARTICLES; MICROSTRUCTURE; COERCIVITY; DEPENDENCE; UNDERLAYER; X=0; AG;

D O I：

10.1016/j.jallcom.2010.09.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

L1(0)-CoPt was obtained by annealing the CoPt film at 600 degrees C after co-sputtering Co and Pt targets in a magnetron sputtering system. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) results showed a transformation from the face-centered-cubic (FCC) structure to the L1(0) ordered structure during the post-deposition annealing. Thermal stress (S-T), intrinsic stress (S-i) and total stress (S-total) in the films decreased with the increase of the annealing temperature. When the Co atomic composition was 50%, the coercivity of the CoPt film reached to a giant value, around 6300 Oe. The stress was released when the film thickness increased. The relaxed residual stress accounted for the enhancement in the coercivity. Magnetization reversal mechanism of the Co50Pt50 film followed neither the S-W model nor the DWM model. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：326 / 331

页数：6

共 48 条

[1] Study of structural microstructural. and magnetic properties of very thin Co50Pt50 films deposited by PLD [J].

Agostinelli, E. ;

Laureti, S. ;

Varvaro, G. ;

Generosi, A. ;

Paci, B. ;

Rossi-Albertini, V. ;

Scavia, G. ;

Testa, A. M. .

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, 2007, 27 (5-8) :1466-1469

[2] X-ray diffraction study on the thermal properties of CuMPt6 (M=3d elements) alloys [J].

Ahmed, Ejaz ;

Takahashi, Miwako ;

Iwasaki, Hiroshi ;

Ohshima, Ken-Ichi .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 473 (1-2) :1-4

[3] On the relationship of magnetocrystalline anisotropy and stoichiometry in epitaxial L10 CoPt (001) and FePt (001) thin films -: art. no. 033904 [J].

Barmak, K ;

Kim, J ;

Lewis, LH ;

Coffey, KR ;

Toney, MF ;

Kellock, AJ ;

Thiele, JU .

JOURNAL OF APPLIED PHYSICS, 2005, 98 (03)

[4] Stoichiometry-anisotropy connections in epitaxial L10 FePt(001) films [J].

Barmak, K ;

Kim, J ;

Lewis, LH ;

Coffey, KR ;

Toney, MF ;

Kellock, AJ ;

Thiele, JU .

JOURNAL OF APPLIED PHYSICS, 2004, 95 (11) :7501-7503

[5] FePt and CoPt nanoparticles co-deposited on silicon dioxide - a comparative study [J].

Castaldi, L. ;

Giannakopoulos, K. ;

Travlos, A. ;

Niarchos, D. ;

Boukari, S. ;

Beaurepaire, E. .

NANOTECHNOLOGY, 2008, 19 (08)

[6] Polyol-process-derived CoPt nanoparticles: Structural and magnetic properties [J].

Chinnasamy, CN ;

Jeyadevan, B ;

Shinoda, K ;

Tohji, K .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :7583-7585

[7] First synthesis by liquid-liquid phase transfer of magnetic CoxPt100-x nanoalloys [J].

Demortiere, A. ;

Petit, C. .

LANGMUIR, 2007, 23 (16) :8575-8584

[8] Microstructure and magnetic properties of Ag/FePt double layer films with different cooling processes [J].

Dong, Kai-feng ;

Yang, Xiao-fei ;

Yan, Jun-bing ;

Cheng, Wei-ming ;

Cheng, Xiao-min ;

Miao, Xiang-shui ;

Xu, Xiao-hong ;

Wang, Fang .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 476 (1-2) :662-666

[9] Are strain-induced effects truly strain induced? A comprehensive study of strained LCMO thin films [J].

Dvorak, J ;

Idzerda, YU ;

Ogale, SB ;

Shinde, S ;

Wu, T ;

Venkatesan, T ;

Godfrey, R ;

Ramesh, R .

JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)

[10]

Goo N. H., 2007, FORMATION HARD MAGNE

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