Nov 15, 2017
Pressure-Induced Superconductivity from Doping-Induced Antiferromagnetic Phase of 112-type Ca1−xLaxFeAs2
Journal of the Physical Society of Japan
- Volume
- 86
- Number
- 11
- First page
- 113705
- Last page
- 113705
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.7566/jpsj.86.113705
- Publisher
- Physical Society of Japan
The effects of pressure on antiferromagnetic (AFM) and superconducting phase transitions of 112-type Ca1-xLaxFeAs2 were studied, and the in-plane electrical resistivity rho(ab) was measured with an indenter-type pressure cell. The AFM phase transition temperatures of T-N = 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 P-c similar or equal to 0, 1.5, and 3.4 GPa, respectively. Correspondingly, the slope of T-N against P decreased as dT(N)/P similar or equal to -15 and -2K/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.
- Link information
- ID information
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- DOI : 10.7566/jpsj.86.113705
- ISSN : 0031-9015
- eISSN : 1347-4073
- Web of Science ID : WOS:000414001900007