Role of interparticle coupling on the tunneling magnetoresistance of granular films in interacting superparamagnetic system

被引：2
|
作者：
Mao, Zhongquan [1 ]
Chen, Dihu [1 ]
He, Zhenhui [1 ]
机构：
[1] Sun Yet Sen Univ, Sch Phys & Engn, Dept Phys, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2008年 / 320卷 / 05期
基金：
中国国家自然科学基金;
关键词：
tunneling magnetoresistance; interaction; superparamagnetism; magnetization; correlation length;
D O I：
10.1016/j.jmmm.2007.07.028
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A phenomenological model is employed to explain the departure of H/T scaling of tunneling magnetoresistance (TMR) in Co-0.43(ZrO2)(0.57) granular films (see [B.J. Hattink, M. Garcia del Muro, Z. Konstantinovic, X. Batlle, A. Labarta, Phys. Rev. B 73 (2006) 045418]). The model bases on the modi. cation of Langevin function by taking into account the field-dependent correlation length, in the framework of Inoue-Maekawa model. Both TMR-H and TMR-H/T curves can be reproduced very well by this model, indicating that the interparticle coupling plays an important role on TMR in the interacting superparamagnetic systems. The influence of anisotropy and spin polarization of the magnetic particles on TMR-H/T curves is also discussed. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：642 / 645
页数：4
相关论文
共 50 条
  • [31] Systematic studies of tunneling magnetoresistance in granular films made from well-defined Co clusters
    Holdenried, M
    Hackenbroich, B
    Micklitz, H
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2001, 231 (01) : L13 - L19
  • [32] Tunneling magnetoresistance effect in Fe-Pb-O and Fe-PbO granular films: a comparison
    Hsu, JH
    Huang, YH
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 203 : 94 - 96
  • [33] Bias voltage dependence of tunneling giant magnetoresistance in heterogeneous Fe-SiO2 granular films
    Honda, S
    Nawate, M
    Umemoto, T
    Mitsudo, S
    Mitani, S
    Fujimori, H
    Motokawa, M
    IEEE TRANSACTIONS ON MAGNETICS, 1999, 35 (05) : 2955 - 2957
  • [34] Bias voltage dependence of tunneling giant magnetoresistance in heterogeneous Fe-SiO2 granular films
    Shimane Univ, Matsue, Japan
    IEEE Trans Magn, 5 pt 1 (2955-2957):
  • [35] Nanoparticle morphology in FeCo-Al2O3 granular films with tunneling giant magnetoresistance
    Wang, CZ
    Zhang, YQ
    Xiao, XG
    Hu, HQ
    Rong, YH
    PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2006, 203 (05): : 970 - 978
  • [36] Tunneling magnetoresistance in Co-ZrO2 granular thin films -: art. no. 045418
    Hattink, BJ
    del Muro, MG
    Konstantinovic, Z
    Batlle, X
    Labarta, A
    Varela, M
    PHYSICAL REVIEW B, 2006, 73 (04)
  • [37] Enhancement of tunneling magnetoresistance through a magnetic barrier of granular Fe-Pb-O system
    Hsu, JH
    Chang, CR
    Huang, YH
    IEEE TRANSACTIONS ON MAGNETICS, 2000, 36 (05) : 2815 - 2817
  • [38] Enhancement of tunneling magnetoresistance through a magnetic barrier of granular Fe-Pb-O system
    Hsu, Jen-Hwa
    Chang, Ching-Ray
    Huang, Yi-Hong
    IEEE Transactions on Magnetics, 2000, 36 (5 I) : 2815 - 2817
  • [39] Enhanced tunneling magnetoresistance of Fe-Al2O3 granular films in the Coulomb blockade regime
    Zhu, T
    Wang, YJ
    PHYSICAL REVIEW B, 1999, 60 (17): : 11918 - 11921
  • [40] Tunneling magnetoresistance of ultra-thin Co-SiO2 granular films with narrow current channels
    Honda, S
    Hirata, M
    Ishimaru, M
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 290 : 1053 - 1055
12345