Electronic structure of Zn1-xCoxO using photoemission and x-ray absorption spectroscopy

被引：123

作者：

Wi, SC ^{[1
]}

Kang, JS

Kim, JH

Cho, SB

Kim, BJ

Yoon, S

Suh, BJ

Han, SW

Kim, KH

Kim, KJ

Kim, BS

Song, HJ

Shin, HJ

Shim, JH

Min, BI

机构：

[1] Catholic Univ Korea, Dept Phys, Puchon 420743, South Korea

[2] Gyeongsang Natl Univ, Dept Phys, Chinju 660701, South Korea

[3] POSTECH, Pohang Accelerator Lab, Pohang 790784, South Korea

[4] POSTECH, Dept Phys, Pohang 790784, South Korea

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 21期

关键词：

D O I：

10.1063/1.1756197

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Electronic structures of homogeneous bulk samples of Zn0.9Co0.1O which do not exhibit diluted ferromagnetic semiconducting (DMS) behavior have been investigated using photoemission spectroscopy and x-ray absorption spectroscopy. We have found that the Co ions in Zn1-xCoxO are in the divalent Co2+(d(7)) states under the tetrahedral symmetry. Our finding indicates that the DMS properties will not be produced when Co ions are properly substituted for Zn sites, implying that the DMS properties observed in Zn1-xCoxO thin films are likely to be extrinsic. (C) 2004 American Institute of Physics.

引用

页码：4233 / 4235

页数：3

共 16 条

[1] 2P X-RAY ABSORPTION OF 3D TRANSITION-METAL COMPOUNDS - AN ATOMIC MULTIPLET DESCRIPTION INCLUDING THE CRYSTAL-FIELD [J].

DEGROOT, FMF ;

FUGGLE, JC ;

THOLE, BT ;

SAWATZKY, GA .

PHYSICAL REVIEW B, 1990, 42 (09) :5459-5468

[2] Zener model description of ferromagnetism in zinc-blende magnetic semiconductors [J].

Dietl, T ;

Ohno, H ;

Matsukura, F ;

Cibert, J ;

Ferrand, D .

SCIENCE, 2000, 287 (5455) :1019-1022

[3] An oxide-diluted magnetic semiconductor: Mn-doped ZnO [J].

Fukumura, T ;

Jin, ZW ;

Ohtomo, A ;

Koinuma, H ;

Kawasaki, M .

APPLIED PHYSICS LETTERS, 1999, 75 (21) :3366-3368

[4] Ferromagnetic properties of Zn1-xMnxO epitaxial thin films [J].

Jung, SW ;

An, SJ ;

Yi, GC ;

Jung, CU ;

Lee, SI ;

Cho, S .

APPLIED PHYSICS LETTERS, 2002, 80 (24) :4561-4563

[5]

Kang JS, 2002, PHYS REV B, V66, DOI 10.1103/PhysRevB.66.113105

[6] Magnetic properties of epitaxially grown semiconducting Zn1-xCoxO thin films by pulsed laser deposition [J].

Kim, JH ;

Kim, H ;

Kim, D ;

Ihm, YE ;

Choo, WK .

JOURNAL OF APPLIED PHYSICS, 2002, 92 (10) :6066-6071

[7] Study of diluted magnetic semiconductor: Co-doped ZnO [J].

Lee, HJ ;

Jeong, SY ;

Cho, CR ;

Park, CH .

APPLIED PHYSICS LETTERS, 2002, 81 (21) :4020-4022

[8] Electronic structure of the oxide-diluted magnetic semiconductor Zn1-xMnxO -: art. no. 085209 [J].

Mizokawa, T ;

Nambu, T ;

Fujimori, A ;

Fukumura, T ;

Kawasaki, M .

PHYSICAL REVIEW B, 2002, 65 (08) :1-5

[9] Electronic structures of III-V based ferromagnetic semiconductors: half-metallic phase [J].

Park, JH ;

Kwon, SK ;

Min, BI .

PHYSICA B-CONDENSED MATTER, 2000, 281 :703-704

[10] Chemical effects at metal/oxide interfaces studied by x-ray-absorption spectroscopy -: art. no. 214422 [J].

Regan, TJ ;

Ohldag, H ;

Stamm, C ;

Nolting, F ;

Lüning, J ;

Stöhr, J ;

White, RL .

PHYSICAL REVIEW B, 2001, 64 (21)

← 1 2 →