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Reversible and irreversible domain wall (DW) motions have been investigated in La 0.7 Sr 0.3 MnO 3 ceramic samples using frequency-response complex permeability with various amplitudes of AC field. We also examine the effects of temperature in the range from 293 to 368K and transverse DC magnetic field with a maximum of 4.40×10 5 A/m on the real part of permeability...
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