2009年12月
Magnetic Properties of RCoGe3 (R: Ce, Pr, and Nd) and Strong Anisotropy of the Upper Critical Field in Non-centrosymmetric Compound CeCoGe3
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- 巻
- 78
- 号
- 12
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JPSJ.78.124713
- 出版者・発行元
- PHYSICAL SOC JAPAN
We grew single crystals of RCoGe3 (R: La, Cc, Pr, and Nd) by the Bi-flux method, and studied the magnetic properties of PrCoGe3 and NdCoGe3 and the pressure-induced superconducting property of CeCoGe3. These compounds crystallize in a non-centrosymmetric tetragonal structure. PrCoGe3 and NdCoGe3 were found to be a paramagnet and an anti ferromagnet with the Neel temperature T-N = 3.8 K, respectively. Crystalline electric field (CEF) schemes were proposed for PrCoGe3 and NdCoGe3. The magnetic property of a pressure-induced superconductor CeCoGe3 is highly different from those of PrCoGe3 and NdCoGe3, or a similar pressure-induced superconductor CeIrSi3. This was discussed in connection with the superconductivity of CeCoGe3. We clarified the upper critical field H-c2 for H parallel to [001] and [100] by measuring the electrical resistivity under pressure P in magnetic fields: H-c2(0) similar or equal to 24T for H parallel to [001] and H-c2(0) similar or equal to 3.1 T for H parallel to [100] at 0 K at P = 7.1 GPa. A huge H-c2(0) value for H parallel to [001] is a combined phenomenon between the Rashba-type antisymmetric spin-orbit interaction and the electronic instability, as observed in CeIrSi3.
- リンク情報
- ID情報
-
- DOI : 10.1143/JPSJ.78.124713
- ISSN : 0031-9015
- Web of Science ID : WOS:000272985600044