Reversed spin polarization at the Co(001)-HfO2(001) interface

被引:14
作者
de Boer, PK [1 ]
de Wijs, GA [1 ]
de Groot, RA [1 ]
机构
[1] Catholic Univ Nijmegen, Mat Res Inst, NL-6525 ED Nijmegen, Netherlands
关键词
D O I
10.1103/PhysRevB.58.15422
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Ab initio electronic-structure calculations on the Co(001)-HfO2(001) interface are reported. The spin polarization of conduction electrons is positive at the interface, i.e., it is reversed with respect to the spin polarization in bulk Co. The electronic structure is very sensitive to the interface structure; without atomic relaxations the reversed spin polarization is not found. The possible relation with spin-polarized tunneling and magnetoresistance is discussed. [S0163-1829(98)08448-3].
引用
收藏
页码:15422 / 15425
页数:4
相关论文
共 28 条
[1]   UNIFIED APPROACH FOR MOLECULAR-DYNAMICS AND DENSITY-FUNCTIONAL THEORY [J].
CAR, R ;
PARRINELLO, M .
PHYSICAL REVIEW LETTERS, 1985, 55 (22) :2471-2474
[2]   MAGNETOCRYSTALLINE ANISOTROPY OF (100) FACE-CENTERED CUBIC CO STRUCTURES DEPOSITED ON CU/SI(100) [J].
CHANG, CA .
APPLIED PHYSICS LETTERS, 1991, 58 (16) :1745-1747
[3]   Electronic structure of La0.5Ca0.5MnO3 [J].
deBoer, PK ;
vanLeuken, H ;
deGroot, RA ;
Rojo, T ;
Barberis, GE .
SOLID STATE COMMUNICATIONS, 1997, 102 (08) :621-626
[4]  
DEBOER PK, UNPUB
[5]   NEW CLASS OF MATERIALS - HALF-METALLIC FERROMAGNETS [J].
DEGROOT, RA ;
MUELLER, FM ;
VANENGEN, PG ;
BUSCHOW, KHJ .
PHYSICAL REVIEW LETTERS, 1983, 50 (25) :2024-2027
[6]   Magnetoresistance governed by fluctuations in ultrasmall Ni/NiO/Co junctions [J].
Doudin, B ;
Redmond, G ;
Gilbert, SE ;
Ansermet, JP .
PHYSICAL REVIEW LETTERS, 1997, 79 (05) :933-936
[7]   SPIN-DEPENDENT TUNNELLING FROM TRANSITION-METAL FERROMAGNETS [J].
HERTZ, JA ;
AOI, K .
PHYSICAL REVIEW B, 1973, 8 (07) :3252-3256
[8]   Enhanced intergrain tunneling magnetoresistance in half-metallic CrO2 films [J].
Hwang, HY ;
Cheong, SW .
SCIENCE, 1997, 278 (5343) :1607-1609
[9]   AB-INITIO MOLECULAR-DYNAMICS SIMULATION OF THE LIQUID-METAL AMORPHOUS-SEMICONDUCTOR TRANSITION IN GERMANIUM [J].
KRESSE, G ;
HAFNER, J .
PHYSICAL REVIEW B, 1994, 49 (20) :14251-14269
[10]   Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set [J].
Kresse, G ;
Furthmuller, J .
PHYSICAL REVIEW B, 1996, 54 (16) :11169-11186