Electric Pulse Induced Resistive Switching of La1-xCaxMnO3 at High Magnetic Field and Low Temperature

doi:10.3724/SP.J.1077.2010.00961

Abstract

Abstract:

The colossal magnetoresistive and electric pulse induced resistive switching properties of La_1-xCa_xMnO₃ (x=0.3, 0.5) polycrystalline at high magnetic field and low temperature were studied. The difference of colossal magnetoresistive and electric pulse induced resistive switching was analyzed. The EPIR effect of La_1-xCa_xMnO₃ (LCMO)(x=0.3, 0.5) polycrystalline also exist at high magnetic field and low temperature. The ratio of high resistance state and low resistance state has no obviously change with varying temperature and magnetic field. The CMR property comes from double exchange and Jahn-Teller effect. Increasing the magnetization by applying an external field would increase the charge mobility of ferromagnetic phase and then decrease the resistance via the double exchange mechanism. Ions motion driven by electric pulses is presented for explaining the resistance switching. The motion of oxygen would change the hole density of local regions. The change of hole density would still exist at low temperature and modulate the low temperature magnetic configuration of LCMO.

Key words: CMR, EPIR, oxygen motion, La_1-xCa_xMnO₃

CLC Number:

O484

WU Zi-Hua, XIE Hua-Qing. Electric Pulse Induced Resistive Switching of La_1-xCa_xMnO₃ at High Magnetic Field and Low Temperature[J]. Journal of Inorganic Materials, 2010, 25(9): 961-965.

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Electric Pulse Induced Resistive Switching of La_1-xCa_xMnO₃ at High Magnetic Field and Low Temperature

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