中国物理B ›› 1998, Vol. 7 ›› Issue (12): 919-924.doi: 10.1088/1004-423X/7/12/006

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

王克勤1, 阮可青1, 曹烈兆1, 周雅琴2, 连贵君2, 张寅2, 熊光成2, 叶红娟3   

  1. (1)Department of Physic, University of Science and Technology of China, Hefei 230026, China; (2)Department of Physics, Beijing University, Beijing 100871, China; (3)National Laboratory for Infrared Physics Chinese Academy of Science, Shanghai 200083, China
  • 收稿日期:1998-04-06 修回日期:1998-07-16 出版日期:1998-12-20 发布日期:1998-12-20
  • 基金资助:
    Project supported Partly by the National Natural Science Foundation of China (Grant No.19674001).

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

ZHOU YA-QIN (周雅琴)a, LIAN GUI-JUN (连贵君)a, ZHANG YIN (张寅)a, XIONG GUANG-CHENG (熊光成)a, WANG KE-QIN (王克勤)b, RUAN KE-QING (阮可青)b, CAO LIE-ZHAO (曹烈兆), YE HONG-JUAN (叶红娟)b   

  1. a Department of Physic, University of Science and Technology of China, Hefei 230026, China; b National Laboratory for Infrared Physics Chinese Academy of Science, Shanghai 200083, China
  • Received:1998-04-06 Revised:1998-07-16 Online:1998-12-20 Published:1998-12-20
  • Supported by:
    Project supported Partly by the National Natural Science Foundation of China (Grant No.19674001).

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摘要： We have measured the resistivity, special heat and AC magnetic suceptibility versus temperature in La1-xCaxMnO3(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 dρ/dT0 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.

Abstract: We have measured the resistivity, special heat and AC magnetic suceptibility versus temperature in La1-xCaxMnO3(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.

中图分类号:  (Other materials)

  • 75.47.Pq
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.))