The effects of pressure on antiferromagnetic (AFM) and superconducting phase transitions of 112-type Ca1−xLaxFeAs2 were studied, and the in-plane electrical resistivity ρab was measured with an indenter-type pressure cell. The AFM phase transition temperatures of TN = 47, 63, and 63 K at ambient pressure for x = 0.18, 0.21, and 0.26 was suppressed by applying pressure P, with superconductivity emerging at critical pressures of Pc ≃ 0, 1.5, and 3.4 GPa, respectively. Correspondingly, the slope of TN against P decreased as dTN/P ≃ −15 and −2 K/GPa for x = 0.21 and 0.26, respectively. Thus, although the AFM phase was stabilized with La doping x, the AFM phase was suppressed by pressure, and superconductivity eventually emerged.
|Publication status||Published - Nov 1 2017|
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