Temperature dependence of tunnel-type GMR in insulating granular systems

被引：26
|
作者：
Mitani, S
Fujimori, H
Ohnuma, S
机构：
[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 98077, Japan
[2] Res Inst Elect & Magnet Mat, Sendai, Miyagi 982, Japan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1998年 / 177卷
关键词：
magnetoresistance-giant; granular systems; tunneling; thin films sputtered;
D O I：
10.1016/S0304-8853(97)00498-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have investigated temperature dependence of tunnel-type giant magnetoresistance (GMR) in insulating granular systems of Co-Al-O and Fe-Al-O. Below 50 K the magnetoresistance Delta/rho(max) remarkably increases with decreasing temperature, resulting in Delta rho/rho(max) = 16% and 25% at 4.2 K for Co52Al20O28 and Fe44Al17O39, respectively. This increase cannot be interpreted well by means of extending the theory for tunnel-type GMR in ferromagnetic tunnel junctions, but it suggests that the magnitude of GMR is influenced by Coulomb blockade in insulating granular systems. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：919 / 920
页数：2
相关论文
共 50 条
  • [21] Time dependence of GMR in granular alloys
    UCNW, Gwynedd, United Kingdom
    IEEE Trans Magn, 6 pt 2 (3961-3963):
  • [22] Transition from insulating to non-insulating temperature dependence of the conductivity in granular metals
    Efetov, KB
    Tschersich, A
    EUROPHYSICS LETTERS, 2002, 59 (01): : 114 - 120
  • [23] TIME-DEPENDENCE OF GMR IN GRANULAR ALLOYS
    GREAVES, SJ
    OGRADY, K
    WATSON, ML
    CHANTRELL, RW
    IEEE TRANSACTIONS ON MAGNETICS, 1995, 31 (06) : 3961 - 3963
  • [24] DESIGN FOR TUNNEL-TYPE SEDIMENT EXCLUDER
    KOTHYARI, UC
    PANDE, PK
    GAHLOT, AK
    JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING, 1994, 120 (01) : 36 - 47
  • [25] Tunnel magnetoresistance oscillations associated with Coulomb staircases in insulating granular systems
    Yakushiji, K
    Mitani, S
    Takanashi, K
    Fujimori, H
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2002, 35 (19) : 2422 - 2426
  • [26] Tunnel-type giant magnetoresisitance in Co-Al-Ta-O insulated granular system
    Yonemura, M
    Naga, S
    Kamei, K
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 2001, 40 (2A): : 740 - 745
  • [27] Tunnel-type giant magnetoresisitance in Co-Al-Ta-O insulated granular system
    Yonemura, M.
    Naga, S.
    Kamei, K.
    Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 2001, 40 (2 A): : 740 - 745
  • [28] INVESTIGATIONS INTO TUNNEL-TYPE SEDIMENT EXCLUDERS
    CHRYSOSTOMOU, VA
    IRRIGATION: THEORY AND PRACTICE, 1989, : 414 - 423
  • [29] Temperature dependence of GMR and effect of annealing on electrodeposited Co-Ag granular films
    Garcia-Torres, Jose
    Valles, Elisa
    Gomez, Elvira
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2010, 322 (20) : 3186 - 3191
  • [30] Tunnel-type giant magnetoresistance in the granular perovskite La0.85Sr0.15MnO3
    Zhang, N
    Ding, WP
    Zhong, W
    Xing, DY
    Du, YW
    PHYSICAL REVIEW B, 1997, 56 (13) : 8138 - 8142
12345