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Unusual resistivity hysteresis in a bulk magnetoresistive ferromagnetic/ferrimagnetic composite (La0.7 Ca0.3 Mn O3 Mn3 O4): Role of demagnetization effects

Vertruyen, B and Cloots, R and Ausloos, M and Fagnard, J-F and Vanderbemden, P (2007) Unusual resistivity hysteresis in a bulk magnetoresistive ferromagnetic/ferrimagnetic composite (La0.7 Ca0.3 Mn O3 Mn3 O4): Role of demagnetization effects. Applied Physics Letters, 91. ISSN 0003-6951

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Abstract

The authors report an intriguing resistivity versus magnetic field dependence in polycrystalline composite samples containing a magnetoresistive manganite (ferromagnetic/conducting La0.7 Ca0.3 Mn O3) and a magnetic manganese oxide (ferrimagnetic/insulating Mn3 O4). At 10 K, when the magnetic field is scanned from positive to negative values, the resistance peak occurs at positive magnetic field, instead of zero or negative field as usually observed in polycrystalline manganite samples. The position of the resistance peak agrees well with the cancellation of the internal magnetic field, suggesting that the demagnetization effects are responsible for this behavior. © 2007 American Institute of Physics.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:09
Last Modified: 08 Dec 2014 02:23
DOI: 10.1063/1.2768883