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Magnetic phase diagram of K2Cr8O16 clarified by high-pressure muon spin spectroscopy
KTH Royal Inst Technol, Dept Appl Phys, Elect 229, SE-16440 Kista, Sweden.
Babes Bolyai Univ, Fac Phys, Cluj Napoca, Romania.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
Toyota Cent Res & Dev Labs Inc, 41-1 Yokomichi, Nagakute, Aichi 4801192, Japan.
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2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 1141Article in journal (Refereed) Published
Abstract [en]

The K2Cr8O16 compound belongs to a series of quasi-1D compounds with intriguing magnetic properties that are stabilized through a high-pressure synthesis technique. In this study, a muon spin rotation, relaxation and resonance (mu+SR) technique is used to investigate the pressure dependent magnetic properties up to 25 kbar. mu+SR allows for measurements in true zero applied field and hereby access the true intrinsic material properties. As a result, a refined temperature/pressure phase diagram is presented revealing a novel low temperature/high pressure (p(C1) = 21 kbar) transition from a ferromagnetic insulating to a high-pressure antiferromagnetic insulator. Finally, the current study also indicates the possible presence of a quantum critical point at p(C2) similar to 33 kbar where the magnetic order in K2Cr8O16 is expected to be fully suppressed even at T = 0 K.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2019. Vol. 9, article id 1141
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-377597DOI: 10.1038/s41598-018-37844-5ISI: 000457616300030PubMedID: 30718649OAI: oai:DiVA.org:uu-377597DiVA, id: diva2:1291795
Funder
Swedish Research Council, 2014-6426Swedish Research Council, 2016-06955Swedish Research Council, 2017-05078Swedish Foundation for Strategic Research Carl Tryggers foundation Available from: 2019-02-26 Created: 2019-02-26 Last updated: 2019-03-07Bibliographically approved

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