Spin hopping in a discontinuous La[sub 0.7]Ca[sub 0.3]MnO[sub 3] film

Ziese, Michael
March 2002
Applied Physics Letters;3/25/2002, Vol. 80 Issue 12, p2144
Academic Journal
Magnetization and magnetotransport properties of a discontinuous La[sub 0.7]Ca[sub 0.3]MnO[sub 3] film on LaAlO[sub 3] are presented. The sample shows transport characteristics of a granular ferromagnet with an extraordinarily large magnetoresistance. The data are successfully interpreted within a model of spin-dependent tunneling between grains taking into account magnetic intergrain correlation effects.


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