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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, 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: 05 Jun 2017 01:15

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