中国物理B ›› 1999, Vol. 8 ›› Issue (4): 306-308.doi: 10.1088/1004-423X/8/4/009

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    

WEAK FERROMAGNETIC PROPERTIES OF Eu1.85Ca0.15CuO4

郭树权, 姚玉书, 熊玉峰, 吴非, 董成   

  1. National Laboratory For Superconductivity, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:1998-09-01 修回日期:1998-11-16 出版日期:1999-04-20 发布日期:1999-04-20

WEAK FERROMAGNETIC PROPERTIES OF Eu1.85Ca0.15CuO4

Guo Shu-quan (郭树权), Yao Yu-shu (姚玉书), Xiong Yu-feng (熊玉峰), Wu Fei (吴非), Dong Cheng (董成)   

  1. National Laboratory For Superconductivity, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:1998-09-01 Revised:1998-11-16 Online:1999-04-20 Published:1999-04-20

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摘要： A weak ferromagnetic transition has been observed for the T'-type compound Eu1.85Ca0.15CuO4. The samples were prepared by a high pressure (5 GPa) synthesis technique. Their transition temperature occurred at 27 K. At 5 K the residual magnetization was 0.033 emu/g, the coercive force was 6.3×104 A/m and the saturation field was larger than 1.6×105 A/m. A field cooling method is proposed as a very convenient way to determine the residual magnetization and coercive force. The compound Eu1.85Ca0.15CuO4 is suggested to use as a sensor to measure the remanant field of SQUID magnetometer.

Abstract: A weak ferromagnetic transition has been observed for the T'-type compound Eu1.85Ca0.15CuO4. The samples were prepared by a high pressure (5 GPa) synthesis technique. Their transition temperature occurred at 27 K. At 5 K the residual magnetization was 0.033 emu/g, the coercive force was 6.3×104 A/m and the saturation field was larger than 1.6×105 A/m. A field cooling method is proposed as a very convenient way to determine the residual magnetization and coercive force. The compound Eu1.85Ca0.15CuO4 is suggested to use as a sensor to measure the remanant field of SQUID magnetometer.

中图分类号: 

  • 7550D