| Autor: |
D K, Pratt, W, Tian, A, Kreyssig, J L, Zarestky, S, Nandi, N, Ni, S L, Bud'ko, P C, Canfield, A I, Goldman, R J, McQueeney |
| Rok vydání: |
2009 |
| Zdroj: |
Physical review letters. 103(8) |
| ISSN: |
0031-9007 |
| Popis: |
Neutron and x-ray diffraction studies show that the simultaneous first-order transition to an orthorhombic and antiferromagnetic (AFM) ordered state in BaFe2As2 splits into two transitions with Co doping. For Ba(Fe0.953Co0.047)2As2, a tetragonal-orthorhombic transition occurs at TS=60 K, followed by a second-order transition to AFM order at TN=47 K. Superconductivity occurs in the orthorhombic state below TC=17 K and coexists with AFM. Below TC, 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 |
| Externí odkaz: |
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