X-ray photoelectron spectroscopy and positron annihilation spectroscopy analysis of surfactant affected FePt spintronic films

被引：2

作者：

Feng, Chun ^{[1
]}

Li, Xujing ^{[1
]}

Liu, Fen ^{[1
]}

Wang, Qiang ^{[1
]}

Yang, Meiyin ^{[1
,2
,3
]}

Zhao, Chongjun

Gong, Kui ^{[4
,5
]}

Zhang, Peng ^{[6
]}

Wang, Bao-Yi ^{[6
]}

Cao, Xing-Zhong ^{[6
]}

Yu, Guanghua ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Mat Phys & Chem, Beijing 100083, Peoples R China

[2] Univ Minnesota, Ctr Micromagnet & Informat Technol MINT, Minneapolis, MN 55455 USA

[3] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

[4] McGill Univ, Ctr Phys Mat, Montreal, PQ H3A 2T8, Canada

[5] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[6] Chinese Acad Sci, Inst High Energy Phys, Key Lab Nucl Anal Tech, Beijing 100049, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2014年 / 308卷

基金：

美国国家科学基金会; 北京市自然科学基金;

关键词：

Spintronic films; Surfactant; Ordering transition; Defect density; NANOPARTICLES; TEMPERATURE;

D O I：

10.1016/j.apsusc.2014.04.190

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：

This paper reports the effects of surfactant Bi atomic diffusion on the microstructure evolution and resulted property manipulation in FePt spintronic films by the quantitative studies of X-ray photoelectron spectroscopy and positron annihilation spectroscopy. The defect density in the FePt layer, which was tunable by varying the thermal treatment temperatures, was found to be remarkably enhanced correlated with the Bi atomic diffusion behavior. The observed defect density evolution substantially favors Fe(Pt) atomic migrations and lowers the energy barrier for atomic ordering transition, resulting in a great improvement of hard magnet property of the films. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：408 / 413

页数：6

共 22 条

[11] Giant spin Hall effect in perpendicularly spin-polarized FePt/Au devices [J].

Seki, Takeshi ;

Hasegawa, Yu ;

Mitani, Seiji ;

Takahashi, Saburo ;

Imamura, Hiroshi ;

Maekawa, Sadamichi ;

Nitta, Junsaku ;

Takanashi, Koki .

NATURE MATERIALS, 2008, 7 (02) :125-129

[12] Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices [J].

Sun, SH ;

Murray, CB ;

Weller, D ;

Folks, L ;

Moser, A .

SCIENCE, 2000, 287 (5460) :1989-1992

[13] CALCULATIONS OF ELECTRON INELASTIC MEAN FREE PATHS FOR 31 MATERIALS [J].

TANUMA, S ;

POWELL, CJ ;

PENN, DR .

SURFACE AND INTERFACE ANALYSIS, 1988, 11 (11) :577-589

[14] Structure-magnetic property correlations in the epitaxial FePt system [J].

Trichy, G. R. ;

Chakraborti, D. ;

Narayan, J. ;

Prater, J. T. .

APPLIED PHYSICS LETTERS, 2008, 92 (10)

[15] Nonvolatile electric-field modulation of magnetic anisotropy in perpendicularly magnetized L10-FePt/(001)[Pb(Mg1/3Nb2/3)]0.7-(PbTiO3)0.3 heterostructures [J].

Tsai, Wu-Chang ;

Liao, Sheng-Chieh ;

Huang, Kuo-Feng ;

Wang, Ding-Shuo ;

Lai, Chih-Huang .

APPLIED PHYSICS LETTERS, 2013, 103 (25)

[16] FeAu/FePt exchange-spring media fabricated by magnetron sputtering and postannealing [J].

Wang, Fang ;

Xu, Xiaohong ;

Liang, Yan ;

Zhang, Jing ;

Wu, Haishun .

APPLIED PHYSICS LETTERS, 2009, 95 (02)

[17]

Wang WG, 2012, NAT MATER, V11, P64, DOI [10.1038/NMAT3171, 10.1038/nmat3171]

[18] Spintronics:: A spin-based electronics vision for the future [J].

Wolf, SA ;

Awschalom, DD ;

Buhrman, RA ;

Daughton, JM ;

von Molnár, S ;

Roukes, ML ;

Chtchelkanova, AY ;

Treger, DM .

SCIENCE, 2001, 294 (5546) :1488-1495

[19]

Yu G. H., 2003, APPL PHYS LETT, V82, P94

[20] Continuously graded anisotropy in single (Fe53Pt47)100-xCux films [J].

Zha, C. L. ;

Dumas, R. K. ;

Fang, Y. Y. ;

Bonanni, V. ;

Nogues, J. ;

Akerman, Johan .

APPLIED PHYSICS LETTERS, 2010, 97 (18)

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