Abstract
We report the preparation and investigation of ferromagnetic La 0.67Sr 0.33MnO 3 (LSMO) thin films with orthogonally (along (110) and (1ı̄0)) distributed nanometer-scale cracks. When the density of cracks reaches ∼10 4 cm −1, the magnetoresistance MR=( R H− R 0)/ R 0>−30% was observed in the magnetic fields ≤200 Oe and temperature range from 5 to >300 K. The discussion about such unique feature will be done based on the spin-polarized electron tunneling and spin scattering.
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