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≤x0.6) 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 T1.5K.
Magnetic phase diagram of La2-xSrxCoO4 revised using muon-spin relaxation / Williams, R. C.; Xiao, F.; Lancaster, T.; DE RENZI, Roberto; Allodi, Giuseppe; Bordignon, Sara; Freeman, P. G.; Pratt, F. L.; Giblin, S. R.; Möller, J. S.; Blundell, S. J.; Boothroyd, A. T.; Prabhakaran, D.. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 93:14(2016), p. 140406(R). [10.1103/PhysRevB.93.140406]
Magnetic phase diagram of La2-xSrxCoO4 revised using muon-spin relaxation
DE RENZI, Roberto;ALLODI, GIUSEPPE;BORDIGNON, Sara;
2016-01-01
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≤x0.6) 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 T1.5K.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
