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

Article

关键词: HIGH-TEMPERATURE SUPERCONDUCTIVITY;    COPPER-OXIDE SUPERCONDUCTORS;    TOPOTACTIC OXIDATION;    ROOM-TEMPERATURE;    SINGLE-CRYSTALS;    COBALT OXIDES;    X-RAY;    TRANSITION;    EXCITATIONS;    CHARGE;   

DOI  :  10.1103/PhysRevB.93.140406

来源: SCIE

【 摘 要 】

We report the results of a muon-spin relaxation (mu SR) 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 less than or similar to 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 greater than or similar to 1.5K.

【 授权许可】

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