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- Title
Scaling of the Stress and Temperature Dependence of the Optical Anisotropy in Ba(FeCo)As.
- Authors
Mirri, C.; Dusza, A.; Bastelberger, S.; Chu, J.-H.; Kuo, H.-H.; Fisher, I.; Degiorgi, L.
- Abstract
We revisit our recent investigations of the optical properties in the underdoped regime of the title compounds with respect to their anisotropic behavior as a function of both temperature and uniaxial stress across the ferro-elastic tetragonal-to-orthorhombic transition. By exploiting a dedicated pressure device, we can tune and control uniaxial stress in situ thus changing the degree of detwinning of the samples in the orthorhombic SDW state as well as pressure-inducing an orthorhombicity in the paramagnetic tetragonal phase. We discover a hysteretic behavior of the optical anisotropy; its stress versus temperature dependence across the structural transition bears testimony to the analogy with the magnetic-field versus temperature dependence of the magnetization in a ferromagnet when crossing the Curie temperature. In this context, we find furthermore an intriguing scaling of the stress and temperature dependence of the optical anisotropy in Ba(FeCo)As.
- Subjects
STRAINS &; stresses (Mechanics); ANISOTROPY; SUPERCONDUCTORS; OPTICAL properties; HYSTERESIS
- Publication
Journal of Superconductivity & Novel Magnetism, 2016, Vol 29, Issue 12, p3053
- ISSN
1557-1939
- Publication type
Article
- DOI
10.1007/s10948-016-3773-y