Thickness dependence of the exchange bias in epitaxial manganite bilayers

被引：29

作者：

Kobrinskii, A. L. ^{[1
]}

Goldman, A. M. ^{[1
]}

Varela, Maria ^{[2
]}

Pennycook, S. J. ^{[2
]}

机构：

[1] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[2] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 09期

基金：

美国国家科学基金会;

关键词：

antiferromagnetic materials; calcium compounds; electron energy loss spectra; exchange interactions (electron); interface magnetism; lanthanum compounds; magnetic anisotropy; magnetic epitaxial layers; magnetic hysteresis; molecular beam epitaxial growth; scanning electron microscopy; transmission electron microscopy; X-ray diffraction; MOLECULAR-BEAM EPITAXY; THIN-FILMS; MAGNETIC ANISOTROPY; LA2/3CA1/3MNO3/LA1/3CA2/3MNO3; MULTILAYERS; MAGNETORESISTANCE; OXIDE; MAGNETOTRANSPORT; SUPERCONDUCTORS; TRANSPORT; GROWTH;

D O I：

10.1103/PhysRevB.79.094405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Exchange bias has been studied in a series of La2/3Ca1/3MnO3/La1/3Ca2/3MnO3 bilayers grown on (001) SrTiO3 substrates by ozone-assisted molecular-beam epitaxy. The high crystalline quality of the samples and interfaces has been verified using high-resolution x-ray diffractometry and Z-contrast scanning transmission electron microscopy with electron-energy-loss spectroscopy. The dependence of exchange bias on the thickness of the antiferromagnetic layer has been investigated. A critical value for the onset of the hysteresis loop shift has been determined. An antiferromagnetic anisotropy constant has been obtained by fitting the results to the generalized Meiklejohn-Bean model.

引用

页数：7

共 40 条

[1] FABRICATION OF HIGH-TC SUPERCONDUCTORS USING OZONE-ASSISTED MOLECULAR-BEAM EPITAXY [J].

ACHUTHARAMAN, VS ;

BEAUCHAMP, KM ;

CHANDRASEKHAR, N ;

SPALDING, GC ;

JOHNSON, BR ;

GOLDMAN, AM .

THIN SOLID FILMS, 1992, 216 (01) :14-20

[2] Exchange anisotropy - a review [J].

Berkowitz, AE ;

Takano, K .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 200 (1-3) :552-570

[3] Low-temperature glassy response of ultrathin La0.8Ca0.2MnO3 films to electric and magnetic fields -: art. no. 132406 [J].

Bhattacharya, A ;

Eblen-Zayas, M ;

Staley, NE ;

Kobrinskii, AL ;

Goldman, AM .

PHYSICAL REVIEW B, 2005, 72 (13)

[4] Exchange bias in a generalized Meiklejohn-Bean approach [J].

Binek, C ;

Hochstrat, A ;

Kleemann, W .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2001, 234 (02) :353-358

[5] Mapping chemical and bonding information using multivariate analysis of electron energy-loss spectrum images [J].

Bosman, M. ;

Watanabe, M. ;

Alexander, D. T. L. ;

Keast, V. J. .

ULTRAMICROSCOPY, 2006, 106 (11-12) :1024-1032

[6] ATOMIC LAYER-BY-LAYER EPITAXY OF CUPRATE SUPERCONDUCTORS [J].

BOZOVIC, I ;

ECKSTEIN, JN ;

VIRSHUP, GF .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1994, 12 (02) :1170-1173

[7] MAGNETOTRANSPORT - AN IDEAL PROBE OF ANISOTROPY ENERGIES IN EPITAXIAL-FILMS [J].

DAHLBERG, ED ;

RIGGS, K ;

PRINZ, GA .

JOURNAL OF APPLIED PHYSICS, 1988, 63 (08) :4270-4275

[8] Electronic and crystal structure of fully strained LaNiO3 films -: art. no. 113408 [J].

Dobin, AY ;

Nikolaev, KR ;

Krivorotov, IN ;

Wentzcovitch, RM ;

Dahlberg, ED ;

Goldman, AM .

PHYSICAL REVIEW B, 2003, 68 (11)

[9] Ambipolar gate effect and low temperature magnetoresistance of ultrathin La0.8Ca0.2MnO3 films -: art. no. 037204 [J].

Eblen-Zayas, M ;

Bhattacharya, A ;

Staley, NE ;

Kobrinskii, AL ;

Goldman, AM .

PHYSICAL REVIEW LETTERS, 2005, 94 (03) :1-4

[10] Anisotropic magnetoresistance in tetragonal La1-xCaxMnO delta thin films [J].

Eckstein, JN ;

Bozovic, I ;

ODonnell, J ;

Onellion, M ;

Rzchowski, MS .

APPLIED PHYSICS LETTERS, 1996, 69 (09) :1312-1314

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