Magnetic Phases in Sr(1-x) Ca(x)Co(2)P(2) Studied by μ+ SR

• Sugiyama, Jun

• Nozaki, Hiroshi

• Harada, Masashi

• Umegaki, Izumi

• Higuchi, Yuki

• Miwa, Kazutoshi

• Imai, Masaki

• Michioka, Chishiro

• Yoshimura, Kazuyoshi

• Ansaldo, Eduardo J.

• Brewer, Jess H.

• Andreica, Daniel

• Baines, Christopher

• Mansson, Martin

Abstract

In order to elucidate the dependence of the magnetic ground state on the Ca content (x) in Sr1-xCaxCo2P2 (0 ≤x ≤1, ThCr2Si2-type structure), we have performed muon spin rotation− and relaxation (μ+SR) experiments on Sr1-xCax Co2P2 powder samples mainly in a zero applied field. The end member compound, SrCo2P2, is found to be paramagnetic down to 19 mK. As x increases, such a paramagnetic ground state is observed down to 1.8 K until x = 0.45. Then, as x increases further, a short-range antiferromagnetic (AF) ordered phase appears at low temperatures for 0.48 ≤ x ≤ 0.75, and finally, a long-range AF ordered phase is stabilized for x > 0.75. The internal magnetic field of the other end member compound, CaCo2P2, is well consistent with that of the A-type AF order state, which was proposed from neutron scattering experiments. The phase diagram determined with μ+SR is different from that proposed by macroscopic measurements. For an isostructural compound, LaCo2P2, static magnetic order is found to be formed below <∼ 130 K.

20th International Conference on Magnetism, ICM 2015

Journal

• Physics Procedia

  Physics Procedia 75 426-434, 2015

  Elsevier BV

Keywords

• muon spin rotation and relaxation
• cobalt phosphide
• antiferromagnet
• phase diagram

Details

• CRID: 1050001335849307264
• NII Article ID: 120006325114
• ISSN: 18753892
• HANDLE: 2433/226433
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles