Half-metallic ferromagnetism:: Example of CrO2 (invited)

被引:356
作者
Coey, JMD [1 ]
Venkatesan, M [1 ]
机构
[1] Trinity Coll Dublin, Dept Phys, Dublin 2, Ireland
关键词
D O I
10.1063/1.1447879
中图分类号
O59 [应用物理学];
学科分类号
摘要
A broad classification scheme is proposed for half-metallic ferromagnets which embraces the possibilities of itinerant and localized electrons, as well as semimetallic and semiconducting electronic structure. Examples of each type are given. The problems of defining and measuring spin polarization are discussed and some characteristics of half-metals are reviewed with reference to chromium dioxide. (C) 2002 American Institute of Physics.
引用
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页码:8345 / 8350
页数:6
相关论文
共 60 条
[1]  
ATTENKOFER K, 1997, J PHYS IV, V7, pC2459
[2]   A CrO2-based magnetic tunnel junction [J].
Barry, A ;
Coey, JMD ;
Viret, M .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (08) :L173-L175
[3]   Evidence for a gap in the excitation spectrum of CrO2 [J].
Barry, A ;
Coey, JMD ;
Ranno, L ;
Ounadjela, K .
JOURNAL OF APPLIED PHYSICS, 1998, 83 (11) :7166-7168
[4]  
BARRY A, 1999, THESIS U DUBLIN
[5]   Electronic structure and Fermi surface of CrO2 [J].
Brener, NE ;
Tyler, JM ;
Callaway, J ;
Bagayoko, D ;
Zhao, GL .
PHYSICAL REVIEW B, 2000, 61 (24) :16582-16588
[6]   LOW-TEMPERATURE NEUTRON POWDER DIFFRACTION STUDY OF CRO2 AND THE VALIDITY OF THE JAHN-TELLER VIEWPOINT [J].
BURDETT, JK ;
MILLER, GJ ;
RICHARDSON, JW ;
SMITH, JV .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1988, 110 (24) :8064-8071
[7]   CHEMICAL AND PHYSICAL-PROPERTIES OF CRO2 AND TETRAVALENT CHROMIUM-OXIDE DERIVATIVES [J].
CHAMBERLAND, BL .
CRC CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES, 1977, 7 (01) :1-31
[8]   Magnetoresistance of chromium dioxide powder compacts [J].
Coey, JMD ;
Berkowitz, AE ;
Balcells, L ;
Putris, FF ;
Barry, A .
PHYSICAL REVIEW LETTERS, 1998, 80 (17) :3815-3818
[9]   Powder magnetoresistance (invited) [J].
Coey, JMD .
JOURNAL OF APPLIED PHYSICS, 1999, 85 (08) :5576-5581
[10]   Characterization of the natural barriers of intergranular tunnel junctions:: Cr2O3 surface layers on CrO2 nanoparticles [J].
Dai, JB ;
Tang, JK ;
Xu, HP ;
Spinu, L ;
Wang, WD ;
Wang, KY ;
Kumbhar, A ;
Li, M ;
Diebold, U .
APPLIED PHYSICS LETTERS, 2000, 77 (18) :2840-2842