High-pressure Synthesis and Bulk Modulus of Non-centrosymmetric Superconductor Mo3Al2C

C Sekine,J Hayashi,E Bauer,Y Kawamura,U Sai

doi:10.1088/1742-6596/950/4/042028

C Sekine, J Hayashi + Show 3 more

Open Access

https://doi.org/10.1088/1742-6596/950/4/042028

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Abstract

Mo3Al2C is a superconductor without inversion symmetry (the transition temperature TC ∼ 9K). We have succeeded in preparing high-quality samples of Mo3Al2C using the high-pressure synthesis technique. The samples were characterized by powder x-ray diffraction (XRD) analysis. Furthermore, powder XRD patterns for the samples with synchrotron radiation have been studied under high pressures up to around 10 GPa and the volume versus pressure curve for the compound has been investigated. A bulk modulus was estimated to be 221 GPa.

Highlights

The Mo-based superconductor Mo3Al2C crystallizes with the -Mn type structure of space groupP4132 with a transition temperature TC ~ 9K [1, 2]
We report the results of powder xray diffraction (XRD) measurements of Mo3Al2C under high pressure to investigate the structural stability of the compound
The prepared samples were characterized by powder x-ray diffraction (XRD) using Co K 1 radiation and silicon as a standard

Summary

Introduction

The Mo-based superconductor Mo3Al2C crystallizes with the -Mn type structure of space group. The structure of the compound does not have a center of inversion. Superconductors without inversion symmetry such as CePt3Si recently received special attention due to their exotic properties [3]. A mixture of spin-singlet and spin-triplet pairs condensate is proposed to explain superconductivity in the non-centrosymmetric compounds. In order to study the superconductivity of Mo3Al2C in detail, high-quality samples without Mo2C, which is a superconductor with TC ~ 3K [4], are required. We have succeeded in preparing high-quality samples of Mo3Al2C without Mo2C under high pressure using a multi-anvil type high-pressure press. We report the results of powder xray diffraction (XRD) measurements of Mo3Al2C under high pressure to investigate the structural stability of the compound

Experimental

Results and discussion

Summary