Two-Dimensional Spin Dynamics in the Itinerant Ferromagnet LaCoPO Revealed by Magnetization and <SUP>31</SUP>P-NMR Measurements

• Sugawara Hitoshi

  Department of Physics, Graduate School of Science, Kyoto University

• Ishida Kenji

  Department of Physics, Graduate School of Science, Kyoto University TRIP, JST Sanban-cho Building

• Nakai Yusuke

  Department of Physics, Graduate School of Science, Kyoto University TRIP, JST Sanban-cho Building

• Yanagi Hiroshi

  Materials and Structures Laboratory, Tokyo Institute of Technology

• Kamiya Toshio

  Materials and Structures Laboratory, Tokyo Institute of Technology ERATO-SORST, Japan Science and Technology Agency (JST)

• Kamihara Yoichi

  TRIP, JST Sanban-cho Building

• Hirano Masahiro

  ERATO-SORST, Japan Science and Technology Agency (JST) Frontier Research Center, Tokyo Institute of Technology

• Hosono Hideo

  Materials and Structures Laboratory, Tokyo Institute of Technology ERATO-SORST, Japan Science and Technology Agency (JST) Frontier Research Center, Tokyo Institute of Technology

Bibliographic Information

Other Title

• Two-dimensional spin dynamics in the itinerant ferromagnet LaCoPO revealed by magnetization and 31P-NMR measurements

Abstract

We have performed magnetization and ³¹P-NMR measurements on the itinerant ferromagnet LaCoPO (Curie temperature T_Curie∼44 K) with a layered structure in order to investigate spin dynamics in the paramagnetic state. The linear scaling between the Knight shift K at the P site and the bulk susceptibility χ above T_Curie indicates that the ³¹P nucleus is suitable for investigating magnetic properties. The temperature and magnetic field dependences of the nuclear spin–lattice relaxation rate divided by the temperature 1⁄T₁T at the P site show characteristic features of itinerant ferromagnets, such as ZrZn₂ and Y(Co_1−xAl_x)₂. In addition, the relationship between 1⁄T₁T and χ above T_Curie suggests that ferromagnetic fluctuations possess a two-dimensional (2D) characteristic. The present data show that LaCoPO is a unique ferromagnet, where the 2D fluctuations anticipated from the crystal structure are predominant down to almost T_Curie.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 78 (11), 113705-113705, 2009

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• cobalt pnictide
• ferromagnetism
• two dimensional
• ferromagnetic fluctuations

Details

• CRID: 1390001204197006592
• NII Article ID: 130005437186
• NII Article ID: 40016829615
• NII Article ID: 210000108055
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.78.113705
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 10438968
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10438968
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.78.113705
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed