Room temperature ferromagnetic properties of epitaxially grown Zn1-XCoXO thin films

被引：0
作者：
Yun, F [1 ]
Rengarajan, V [1 ]
Nause, J [1 ]
Morkoc, H [1 ]
机构：
[1] Virginia Commonwealth Univ, Dept Elect Engn, Richmond, VA 23284 USA
来源：
MAGNETO-OPTICAL MATERIALS FOR PHOTONICS AND RECORDING | 2005年 / 834卷
关键词：
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have conducted a systematic magnetic characterization of a series of Zn1-xCoxO samples with different cobalt composition. The Zn1-xCoxO thin films were epitaxially grown by metal organic chemical vapor deposition (MOCVD) on quartz and ZnO substrates. The Co composition was adjusted by controlling the bubbler temperature and carrier gas flow. The magnetization measurements were performed using a Quantum Design MPMS system, which utilizes a superconducting quantum interference device (SQUID) magnetometer. Magnetic hysteresis curves were observed at 5K which persisted up to 300K, possibly characteristic of ferromagnetic behavior. Temperature dependent magnetization was recorded under both zero-field cooled (ZFC) and field cooled (FC) conditions. Changes of magnetization were observed under ZFC and FC conditions in some samples from 5K up to 300K. Composition-dependent changes in magnetization were also observed among samples with different cobalt doping, indicative of ferromagnetism related directly to cobalt incorporation. Magnetic field dependent magnetization at various temperatures with field up to 5 Tesla suggests the Zn1-xCoxO layers were not paramagnetic.
引用
收藏
页码：261 / 266
页数：6
相关论文
共 11 条
  • [1] Magneto-optical properties of ZnO-based diluted magnetic semiconductors
    Ando, K
    Saito, H
    Jin, ZW
    Fukumura, T
    Kawasaki, M
    Matsumoto, Y
    Koinuma, H
    [J]. JOURNAL OF APPLIED PHYSICS, 2001, 89 (11) : 7284 - 7286
  • [2] Large magneto-optical effect in an oxide diluted magnetic semiconductor Zn1-xCoxO
    Ando, K
    Saito, H
    Jin, ZW
    Fukumura, T
    Kawasaki, M
    Matsumoto, Y
    Koinuma, H
    [J]. APPLIED PHYSICS LETTERS, 2001, 78 (18) : 2700 - 2702
  • [3] Zener model description of ferromagnetism in zinc-blende magnetic semiconductors
    Dietl, T
    Ohno, H
    Matsukura, F
    Cibert, J
    Ferrand, D
    [J]. SCIENCE, 2000, 287 (5455) : 1019 - 1022
  • [4] Magnetic properties of mn-doped ZnO
    Fukumura, T
    Jin, ZW
    Kawasaki, M
    Shono, T
    Hasegawa, T
    Koshihara, S
    Koinuma, H
    [J]. APPLIED PHYSICS LETTERS, 2001, 78 (07) : 958 - 960
  • [5] DILUTED MAGNETIC SEMICONDUCTORS
    FURDYNA, JK
    [J]. JOURNAL OF APPLIED PHYSICS, 1988, 64 (04) : R29 - R64
  • [6] Inductively coupled plasma etching of SiC in SF6/O2 and etch-induced surface chemical bonding modifications
    Jiang, LD
    Cheung, R
    Brown, R
    Mount, A
    [J]. JOURNAL OF APPLIED PHYSICS, 2003, 93 (03) : 1376 - 1383
  • [7] Ferromagnetic properties of Zn1-xMnxO epitaxial thin films
    Jung, SW
    An, SJ
    Yi, GC
    Jung, CU
    Lee, SI
    Cho, S
    [J]. APPLIED PHYSICS LETTERS, 2002, 80 (24) : 4561 - 4563
  • [8] Wide bandgap GaN-based semiconductors for spintronics
    Pearton, SJ
    Abernathy, CR
    Thaler, GT
    Frazier, RM
    Norton, DP
    Ren, F
    Park, YD
    Zavada, JM
    Buyanova, A
    Chen, WM
    Hebard, AF
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (07) : R209 - R245
  • [9] Stabilization of ferromagnetic states by electron doping in Fe-, Co- or Ni-doped ZnO
    Sato, K
    Katayama-Yoshida, H
    [J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2001, 40 (4A): : L334 - L336
  • [10] Magnetic and electric properties of transition-metal-doped ZnO films
    Ueda, K
    Tabata, H
    Kawai, T
    [J]. APPLIED PHYSICS LETTERS, 2001, 79 (07) : 988 - 990
12