Sign reversal of anisotropic magnetoresistance in La0.7Ca0.3MnO3/SrTiO3 ultrathin films

被引：21
|
作者：
Sharma, Himanshu [1 ]
Tulapurkar, A. [2 ]
Tomy, C. V. [1 ]
机构：
[1] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India
[2] Indian Inst Technol, Dept Elect Engn, Bombay 400076, Maharashtra, India
来源：
APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 22期
关键词：
D O I：
10.1063/1.4903236
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present the observation of strain induced sign reversal of anisotropic magnetoresistance (AMR) in La0.7Ca0.3MnO3 (LCMO) ultrathin films (thickness similar to 4 nm) deposited on SrTiO3 (001) substrate (STO). We have also observed unusually large AMR (similar to 24%) in LCMO/STO thin films with thickness of 6 nm below but close to its Curie temperature (TC) which decreases as the film thickness increases. The sign reversal of AMR (with a maximum value of -6%) with magnetic field or temperature for the 4 nm thin film may be attributed to the increase in tensile strain in the plane of the thin film which in turn facilitates the rotation of the magnetization easy axis. (C) 2014 AIP Publishing LLC.
引用
收藏
页数：4
相关论文
共 50 条
  • [21] Magnetoelastic coupling in La0.7Ca0.3MnO3/BaTiO3 ultrathin films
    Alberca, A.
    Nemes, N. M.
    Mompean, F. J.
    Feher, T.
    Simon, F.
    Tornos, J.
    Leon, C.
    Munuera, C.
    Kirby, B. J.
    Fitzsimmons, M. R.
    Hernando, A.
    Santamaria, J.
    Garcia-Hernandez, M.
    PHYSICAL REVIEW B, 2013, 88 (13)
  • [22] Microstructures of epitaxial La0.7Ca0.3MnO3 thin films grown on SrTiO3 and NdGaO3 substrates
    He, JQ
    Jia, CL
    Schubert, J
    Wang, RH
    JOURNAL OF CRYSTAL GROWTH, 2004, 265 (1-2) : 241 - 249
  • [23] Magnetoresistance of mechanically induced grain boundaries in La0.7Ca0.3MnO3 films
    Appl Phys Lett, 8 (1140):
  • [24] Effect of oxygen annealing on the magnetoresistance in La0.7Ca0.3MnO3 epitaxial films
    Nam, BC
    Kim, WS
    Choi, HS
    Kim, JC
    Hur, NH
    Kim, IS
    Park, YK
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2001, 34 (01) : 54 - 59
  • [25] Magnetoresistance of polycrystalline La0.7Ca0.3MnO3 films in a microwave magnetic field
    Lucun, A.
    Butkute, R.
    Maneikis, A.
    Kiprijanovic, O.
    Anisimovas, F.
    Gradauskas, T.
    Suziedelis, A.
    Vengalis, B.
    Kancleris, Z.
    Asmontas, S.
    ACTA PHYSICA POLONICA A, 2007, 111 (01) : 147 - 152
  • [26] Magnetoresistance of mechanically induced grain boundaries in La0.7Ca0.3MnO3 films
    Srinitiwarawong, C
    Ziese, M
    APPLIED PHYSICS LETTERS, 1998, 73 (08) : 1140 - 1142
  • [27] Large photoconductivity of oxygen-deficient La0.7Ca0.3MnO3/SrTiO3 heterostructures
    Beyreuther, E.
    Thiessen, A.
    Grafstroem, S.
    Doerr, K.
    Eng, L. M.
    JOURNAL OF PHYSICS-CONDENSED MATTER, 2010, 22 (17)
  • [28] Transport and magnetoresistance properties of nanocrystalline La0.7Ca0.3MnO3
    Pogorily, AN
    Tovstolytkin, AI
    Vovk, AY
    Bondarkova, GV
    Silantiev, VI
    Cherepov, SV
    Belous, AG
    Yanchevski, OZ
    EUROPEAN MAGNETIC MATERIALS AND APPLICATIONS, 2001, 373-3 : 621 - 624
  • [29] Anisotropic magnetoresistance of La0.7Ca0.3MnO3 thin film biepitaxial step junctions
    Chen, S. F.
    Chang, W. J.
    Hsieh, C. C.
    Liu, S. J.
    Juang, J. Y.
    Wu, K. H.
    Uen, T. M.
    Lin, J. -Y.
    Gou, Y. S.
    JOURNAL OF APPLIED PHYSICS, 2006, 100 (11)
  • [30] Photoelectric response of Schottky barrier in La0.7Ca0.3MnO3/Nb:SrTiO3 heterojunctions
    Luo, Z.
    Gao, J.
    Djurisic, A. B.
    Yip, C. T.
    Zhang, G. B.
    APPLIED PHYSICS LETTERS, 2008, 92 (18)
12345