First-order reversal curve analysis of graded anisotropy FePtCu films

被引：29

作者：

Bonanni, Valentina ^{[1
]}

Fang, Yeyu ^{[1
]}

Dumas, Randy K. ^{[2
]}

Zha, Chaolin ^{[1
]}

Bonetti, Stefano ^{[1
]}

Nogues, Josep ^{[1
,3
,4
]}

Akerman, Johan ^{[1
,2
]}

机构：

[1] Royal Inst Technol KTH, S-16440 Kista, Sweden

[2] Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden

[3] ICREA, Bellaterra 08193, Spain

[4] Ctr Invest Nanociencia & Nanotecnol ICN CSIC, Bellaterra 08193, Spain

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 20期

基金：

瑞典研究理事会;

关键词：

D O I：

10.1063/1.3515907

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The reversal mechanisms of graded anisotropy FePtCu films have been investigated by alternating gradient magnetometer (AGM) and magneto-optical Kerr effect (MOKE) measurements with first-order reversal curve (FORC) techniques. The AGM-FORC analysis, which clearly shows the presence of soft and hard components, is unable to resolve how these phases are distributed throughout the film thickness. MOKE-FORC measurements, which preferentially probe the surface of the film, reveal that the soft components are indeed located toward the top surface. Combining AGM-FORC with the inherent surface sensitivity of MOKE-FORC analysis allows for a comprehensive analysis of heterogeneous systems such as graded materials. (C) 2010 American Institute of Physics. [doi:10.1063/1.3515907]

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页数：3

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