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Magnetic phases in Sr1-xCaxCo2P2 studied by mu+SR
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2015 (English)In: 20TH INTERNATIONAL CONFERENCE ON MAGNETISM, ICM 2015, Elsevier, 2015, 426-434 p.Conference paper (Refereed)
Abstract [en]

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 (mu+SR) experiments on Sr1-xCaxCo2P2 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 mu+SR is different from that proposed by macroscopic measurements. For an isostructural compound, LaCo2P2, static magnetic order is found to be formed below similar to 130 K.

Place, publisher, year, edition, pages
Elsevier, 2015. 426-434 p.
, Physics Procedia, ISSN 1875-3892 ; 75
Keyword [en]
muon spin rotation and relaxation, cobalt phosphide, antiferromagnet, phase diagram
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-193305DOI: 10.1016/j.phpro.2015.12.052ISI: 000381129300060ScopusID: 2-s2.0-84974666956OAI: diva2:1032993
20th International Conference on Magnetism, JUL 05-10, 2015, Span Soc Magnetism, Barcelona, SPAIN

QC 20161005

Available from: 2016-10-05 Created: 2016-09-30 Last updated: 2016-10-05Bibliographically approved

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