AGNETORESISTANCE, SPECIAL HEAT AND AC MAGNETIC SUSCEPTIBILITY IN La1-xCaxMnO3 SYSTEM

doi:10.1088/1004-423X/7/12/006

Abstract

Abstract We have measured the resistivity, special heat and AC magnetic suceptibility versus temperature in La_1-xCa_xMnO₃(LCMO) bulk samples with x=0.3, 0.4, 0.5, 0.6. In the LCMO (x=0.3 and 0.4) samples a transition from d$\rho$/dT<0 to d$\rho$/dT>0 was observed, accompanied by a peak in specific heat. In AC magnetic suceptibility measurement, a ferromagnetic and an antiferromagnetic transitions were observed in LCMO (x=0.5) sample.

Received: 06 April 1998
Revised: 16 July 1998
Accepted manuscript online:

PACS:	75.47.Pq	(Other materials)
	75.40.Cx	(Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))
	75.30.Cr	(Saturation moments and magnetic susceptibilities)
	75.30.Kz	(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))

Fund: Project supported Partly by the National Natural Science Foundation of China (Grant No.19674001).

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ZHOU YA-QIN (周雅琴), LIAN GUI-JUN (连贵君), ZHANG YIN (张寅), XIONG GUANG-CHENG (熊光成), WANG KE-QIN (王克勤), RUAN KE-QING (阮可青), CAO LIE-ZHAO (曹烈兆), YE HONG-JUAN (叶红娟) AGNETORESISTANCE, SPECIAL HEAT AND AC MAGNETIC SUSCEPTIBILITY IN La_1-xCa_xMnO₃ SYSTEM 1998 Acta Physica Sinica (Overseas Edition) 7 919

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AGNETORESISTANCE, SPECIAL HEAT AND AC MAGNETIC SUSCEPTIBILITY IN La1-xCaxMnO3 SYSTEM

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AGNETORESISTANCE, SPECIAL HEAT AND AC MAGNETIC SUSCEPTIBILITY IN La_1-xCa_xMnO₃ SYSTEM