Magnetotransport and magnetic domain structure in compressively strained colossal magnetoresistance films | Zendy

Yan Wu | Zendy; Y. Suzuki | Zendy; U. Rüdiger | Zendy; Jia Yu | Zendy; Andrew D. Kent | Zendy; T. K. Nath | Zendy; ChangBeom Eom | Zendy

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Magnetotransport and magnetic domain structure in compressively strained colossal magnetoresistance films

Author(s) -

Yan Wu,

Y. Suzuki,

U. Rüdiger,

Jia Yu,

Andrew D. Kent,

T. K. Nath,

ChangBeom Eom

Publication year - 1999

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.124995

Subject(s) - condensed matter physics , magnetoresistance , colossal magnetoresistance , magnetic domain , materials science , magnetic force microscope , domain wall (magnetism) , magnetic anisotropy , anisotropy , giant magnetoresistance , thin film , magnetic structure , perpendicular , magnetization , magnetic field , physics , nanotechnology , optics , quantum mechanics , geometry , mathematics

We have studied the magnetoresistance (MR) of compressively strained La0.7Sr0.3MnO3 (LSMO) films in various magnetic states in order to understand the role of magnetic domain structure on magnetotransport. In thin films of LSMO on (100) LaAlO3, the perpendicular magnetic anisotropy results in perpendicularly magnetized domains with fine scale ∼200 nm domain subdivision, which we image directly at room temperature using magnetic force microscopy. The main MR effects can be understood in terms of bulk colossal MR and anisotropic MR. We also find evidence for a small domain wall contribution to the MR, which is an order of magnitude larger than expected from a double exchange model.

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