Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

3-10-2017

Journal or Book Title

Physical Review Letters

Volume

118

Issue

10

First Page

107002

DOI

10.1103/PhysRevLett.118.107002

Abstract

We study the effect of applied strain as a physical control parameter for the phase transitions of Ca(Fe1−xCox)2As2 using resistivity, magnetization, x-ray diffraction, and 57Fe Mössbauer spectroscopy. Biaxial strain, namely, compression of the basal plane of the tetragonal unit cell, is created through firm bonding of samples to a rigid substrate via differential thermal expansion. This strain is shown to induce a magnetostructural phase transition in originally paramagnetic samples, and superconductivity in previously nonsuperconducting ones. The magnetostructural transition is gradual as a consequence of using strain instead of pressure or stress as a tuning parameter.

Comments

This article is published as Böhmer, A. E., A. Sapkota, A. Kreyssig, S. L. Bud’ko, G. Drachuck, S. M. Saunders, A. I. Goldman, and P. C. Canfield. "Effect of biaxial strain on the phase transitions of Ca(Fe1−xCox)2As2." Physical Review Letters 118, no. 10 (2017): 107002. DOI: 10.1103/PhysRevLett.118.107002. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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