Synthesis, structure and exchange bias in Cr2O3/CrO2/Cr2O5 particles

被引：24

作者：

Si, P. Z. ^{[1
]}

Wang, H. X. ^{[1
]}

Jiang, W. ^{[1
]}

Lee, J. G. ^{[2
]}

Choi, C. J. ^{[2
]}

Liu, J. J. ^{[3
]}

机构：

[1] China Jiliang Univ, Zhejiang Key Lab Magnet Mat, Hangzhou 310018, Peoples R China

[2] Korea Inst Mat Sci, Chang Won 641831, Gyeongnam, South Korea

[3] Ningbo Univ, Fac Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China

来源：

THIN SOLID FILMS | 2011年 / 519卷 / 23期

关键词：

Exchange bias; CrO2; Cr2O3; Magnetic properties; CRO2; XPS;

D O I：

10.1016/j.tsf.2011.03.097

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the synthesis, structure and magnetic properties of a novel exchange bias system with Cr2O3/CrO2/Cr2O5 interfaces. Chromium oxide particles with mixed chromium valences were prepared by sintering CrO3 in air. X-ray diffraction patterns show that CrO3 lost its oxygen gradually with increasing temperature and time through Cr3O8, Cr2O5, CrO2, and finally Cr2O3 at temperatures above 760 K. X-ray photoelectron spectra indicate a low CrO2 content and a binding energy of 579.3 eV for Cr 2p(3/2) photoelectrons in Cr2O5. Chromium dioxide was found to stably coexist with Cr2O3 and Cr2O5 in the particles. Magnetic measurements show hysteresis loop shifts in the sample, indicating an exchange bias induced by antiferromagnetic Cr2O3/Cr2O5 in ferromagnetic CrO2. An exchange bias of 9 mT at 5 K and a coercivity of 26.3 mT were observed in the chromium oxide particles containing CrO2. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：8423 / 8425

页数：3

共 11 条

[1] AN XPS STUDY OF THE ELECTRONIC-STRUCTURE OF THE ZNXCD1-XCR2S4 ZNXCD1-XCR2SE4 SPINEL SYSTEM [J].

AGOSTINELLI, E ;

BATTISTONI, C ;

FIORANI, D ;

MATTOGNO, G .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1989, 50 (03) :269-272

[2] Morphology and stability in a half-metallic ferromagnetic CrO2 compound of nanoparticles synthesized via a polymer precursor [J].

Biswas, S ;

Ram, S .

CHEMICAL PHYSICS, 2004, 306 (1-3) :163-169

[3] MAGNETIC AND STRUCTURAL STUDIES OF CR2O5 AND CR3O8 [J].

HEWSTON, TA ;

CHAMBERLAND, BL .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1984, 43 (01) :89-95

[4] X-RAY PHOTOELECTRON SPECTROSCOPIC STUDIES OF CRO2 AND SOME RELATED CHROMIUM COMPOUNDS [J].

IKEMOTO, I ;

ISHII, K ;

KINOSHITA, S ;

KURODA, H ;

ALARIOFRANCO, MA ;

THOMAS, JM .

JOURNAL OF SOLID STATE CHEMISTRY, 1976, 17 (04) :425-430

[5] Determination of the spin polarization of half-metallic CrO2 by point contact Andreev reflection [J].

Ji, Y ;

Strijkers, GJ ;

Yang, FY ;

Chien, CL ;

Byers, JM ;

Anguelouch, A ;

Xiao, G ;

Gupta, A .

PHYSICAL REVIEW LETTERS, 2001, 86 (24) :5585-5588

[6] AN XPS STUDY OF THE PHILLIPS CR/SILICA POLYMERIZATION CATALYST [J].

MERRYFIELD, R ;

MCDANIEL, M ;

PARKS, G .

JOURNAL OF CATALYSIS, 1982, 77 (02) :348-359

[7] INVESTIGATION OF A PASSIVE FILM ON AN IRON CHROMIUM-ALLOY BY AES AND XPS [J].

MISCHLER, S ;

MATHIEU, HJ ;

LANDOLT, D .

SURFACE AND INTERFACE ANALYSIS, 1988, 11 (04) :182-188

[8] Half-metallic exchange bias ferromagnetic/antiferromagnetic interfaces in transition-metal chalcogenides [J].

Nakamura, K ;

Kato, Y ;

Akiyama, T ;

Ito, T ;

Freeman, AJ .

PHYSICAL REVIEW LETTERS, 2006, 96 (04)

[9] Exchange bias in nanostructures [J].

Nogués, J ;

Sort, J ;

Langlais, V ;

Skumryev, V ;

Suriñach, S ;

Muñoz, JS ;

Baró, MD .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2005, 422 (03) :65-117

[10] STRUCTURE AND MAGNETIC PROPERTIES OF MANGANESE OXIDE NANOPARTICLES PREPARED BY ARC SUBLIMATION [J].

Si, P. Z. ;

Wang, H. X. ;

Jiang, W. ;

Lee, J. G. ;

Choi, C. J. ;

Sohnel, T. .

MODERN PHYSICS LETTERS B, 2010, 24 (31) :3025-3032

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