Hydrogen-induced ferromagnetism in ZnCoO

被引：123
作者：
Lee, HJ
Park, CH
Jeong, SY [1 ]
Yee, KJ
Cho, CR
Jung, MH
Chadi, DJ
机构：
[1] Pusan Natl Univ, Res Ctr Dielect & Adv Matter Phys, Pusan 609735, South Korea
[2] Pusan Natl Univ, Sch Nano Sci & Technol, Pusan 609735, South Korea
[3] Chungnam Natl Univ, Dept Phys, Taejon 305764, South Korea
[4] Korea Basic Sci Inst, Pusan 609735, South Korea
[5] Korea Basic Sci Inst, Taejon 305764, South Korea
[6] NEC Labs Amer, Princeton, NJ 08540 USA
来源：
APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 06期
基金：
新加坡国家研究基金会;
关键词：
D O I：
10.1063/1.2171789
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have investigated experimentally the effects of n-type impurities such as Al and H on the magnetic properties of ZnCoO. The carrier density changes slightly upon the introduction of hydrogen but increases significantly in the case of Al. A measurement of magnetic circular dichroism indicates that, of the two impurities, only H induces ferromagnetism in ZnCoO. Our experimental data suggest that, unlike Al, H plays an important role in the enhancement of ferromagnetic spin-spin interactions that goes much beyond a carrier-mediated effect. (c) 2006 American Institute of Physics.
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