Electronic Resource
Peng, H. B.
;
Zhao, B. R.
;
Xie, Z.
;
[et al.]
Lin, Y.
;
Zhu, B. Y.
;
Hao, Z.
;
Ni, Y. M.
;
Tao, H. J.
;
Dong, X. L.
;
Xu, B.
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
74 (1999), S. 1606-1608
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Formation of an ordered surface structure in La0.5Ca0.5MnO3 films due to the mismatch of the thermal expansion coefficient between the film and the substrate has been investigated. The surface pattern consists of grain chains located on regular orthogonal cracks. The cracks serve as weak-link grain boundaries, and unusually enhanced low-field magnetoresistance (−14.4% in 400 Oe at 90 K) has been observed, which may be explained by spin-polarized tunneling across the grain boundaries. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.123631
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