Magnetic properties of LCoAsO (L=La–Gd)

• 太田, 寛人

• 吉村, 一良

抄録

We synthesized a series of CoAs based weakly itinerant ferromagnetic compound LCoAsO (L: lanthanoids) and systematically studied a L dependence on magnetic properties. Lattice constants a and c decrease monotonically with the decrease in the ion size of L3+. In the cases of L=Nd, Sm, and Gd, a ferromagneticantiferromagnetic transition was observed at TN=15, 35, and 75 K, respectively, indicating the existence of unconventional interaction between ferromagnetically ordered itinerant electrons of Co. The Curie temperature TC increases from 55 to 75 K by changing La to Ce while from Ce to Gd the TC does not change so much,being quite similar to the L site dependence of the superconducting transition temperature Tc in FeAs-based high-Tc compound LFeAsO. We discussed the mechanism of ferromagnetic-antiferromagnetic transition and the lanthanoid dependence of TC.

収録刊行物

• Physical Review B

  Physical Review B 80 (18), 2009-11

  American Physical Society

詳細情報

• CRID: 1050845760547170304
• NII論文ID: 120001822669
• ISSN: 10980121
• HANDLE: 2433/91798
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles