Magnetic phase diagram of La2-xSrxCoO 4 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, S.R.; Möller, J.S.; Blundell, S.J.; Boothroyd, A.T.; Prabhakaran, D.

Abstract

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.

Citation

Williams, R., Xiao, F., Lancaster, T., De Renzi, R., Allodi, G., Bordignon, S., …Prabhakaran, D. (2016). Magnetic phase diagram of La2-xSrxCoO 4 revised using muon-spin relaxation. Physical Review B, 93(14), Article 140406(R). https://doi.org/10.1103/physrevb.93.140406

• Journal Article Type: Article
• Acceptance Date: Mar 30, 2016
• Online Publication Date: Apr 14, 2016
• Publication Date: Apr 14, 2016
• Deposit Date: Apr 15, 2016
• Publicly Available Date: Apr 18, 2016
• Journal: Physical Review B
• Print ISSN: 2469-9950
• Electronic ISSN: 2469-9969
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 93
• Issue: 14
• Article Number: 140406(R)
• DOI: https://doi.org/10.1103/physrevb.93.140406
• Public URL: https://durham-repository.worktribe.com/output/1386626
• Related Public URLs: http://arxiv.org/abs/1510.06244