Scaling of the Stress and Temperature Dependence of the Optical Anisotropy in Ba(Fe1-x Co x )2As2
- Federal Inst. of Technology, Zurich (Switzerland). Laboratorium fur Festkorperphysik
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; Stanford Univ., CA (United States). Dept. of Applied Physics
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. Here 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(Fe1-xCox)2As2.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Swiss National Science Foundation (SNSF)
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1361130
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Vol. 29, Issue 12; ISSN 1557-1939
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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