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Title: Low-field ac magnetotransport in La0.6Bi0.1Sr 0.3MnO3
Authors: Barik, S.K.
Mahendiran, R. 
Issue Date: 2012
Citation: Barik, S.K., Mahendiran, R. (2012). Low-field ac magnetotransport in La0.6Bi0.1Sr 0.3MnO3. ECS Transactions 50 (10) : 253-260. ScholarBank@NUS Repository.
Abstract: We report temperature and field dependence of ac resistance (Z') and reactance (Z") of La0.6Bi0.1Sr0.3MnO 3 in the radio frequency range (f = 0.1-5 MHz) under low dc magnetic fields (H ≤ 1 kOe). While the Z' in zero field shows a weak peak around the ferromagnetic-paramagnetic transition (TC) for f ≤ 100 kHz, it shows an abrupt jump around the TC for f = 5 MHz. In contrast, the Z" shows an abrupt increase around the TC for all frequencies. We found a maximum ac magnetoresistance of -24.2% at f = 5 MHz and magnetoreactance of -19.6% at f = 0.1 MHz for ΔH = 500 Oe. In comparison to ac magnetoresistance, the dc magnetoresistance shows similar value for ΔH = 50 kOe. It is suggested that the huge ac magnetoresistance arises from the suppression of ac transverse permeability which results in enhanced electromagnetic skin depth under a magnetic field. © The Electrochemical Society.
Source Title: ECS Transactions
ISBN: 9781607683582
ISSN: 19385862
DOI: 10.1149/05010.0253ecst
Appears in Collections:Staff Publications

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