Coexistence of Competing Antiferromagnetic and Superconducting Phases in the UnderdopedBa(Fe0.953Co0.047)2As2Compound Using X-ray and Neutron Scattering Techniques
| Autor: | Jerel L. Zarestky, Alan I. Goldman, S.L. Bud'ko, Andreas Kreyssig, N. Ni, Shibabrata Nandi, D. K. Pratt, Robert J. McQueeney, P. C. Canfield, Wei Tian |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Physical Review Letters. 103 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.103.087001 |
| Popis: | Neutron and x-ray diffraction studies show that the simultaneous first-order transition to an orthorhombic and antiferromagnetic (AFM) ordered state in $\mathrm{BaF}{\mathrm{e}}_{2}{\mathrm{As}}_{2}$ splits into two transitions with Co doping. For $\mathrm{Ba}({\mathrm{Fe}}_{0.953}{\mathrm{Co}}_{0.047}{)}_{2}{\mathrm{As}}_{2}$, a tetragonal-orthorhombic transition occurs at ${T}_{S}=60\text{ }\text{ }\mathrm{K}$, followed by a second-order transition to AFM order at ${T}_{N}=47\text{ }\text{ }\mathrm{K}$. Superconductivity occurs in the orthorhombic state below ${T}_{C}=17\text{ }\text{ }\mathrm{K}$ and coexists with AFM. Below ${T}_{C}$, the static Fe moment is reduced along with a redistribution of low energy magnetic excitations indicating competition between coexisting superconductivity and AFM order. |
| Databáze: | OpenAIRE |
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