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Magnetic phase diagram of La2−xSrxCoO4 revised using muon-spin relaxation

Williams, R. C., Xiao, F., Lancaster, T., De Renzi, R., Allodi, G., Bordignon, S., Freeman, P. G., Pratt, F. L., Giblin, Sean ORCID:, Möller, J. S., Blundell, S. J., Boothroyd, A. T. and Prabhakaran, D. 2016. Magnetic phase diagram of La2−xSrxCoO4 revised using muon-spin relaxation. Physical Review B 93 (14) , 140406(R). 10.1103/PhysRevB.93.140406

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We report the results of a muon-spin relaxation (μSR) investigation of La2−xSrxCoO4, an antiferromagnetic insulating series which has been shown to support charge ordered and magnetic stripe phases and an hourglass magnetic excitation spectrum. We present a revised magnetic phase diagram, which shows that the suppression of the magnetic ordering temperature is highly sensitive to small concentrations of holes. Distinct behavior within an intermediate x range (0.2≤x≲0.6) suggests that the putative stripe ordered phase extends to lower x than previously thought. Further charge doping (0.67≤x≤0.9) prevents magnetic ordering for T≳1.5K.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 2469-9950
Date of Acceptance: 9 March 2016
Last Modified: 18 Nov 2023 05:01

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