First-order structural transition in the magnetically ordered phase of Fe1.13Te
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Specific heat, resistivity, magnetic susceptibility, linear thermal expansion (LTE), and high-resolution synchrotron x-ray powder diffraction investigations of single crystals Fe1+yTe (0.06 ≤y≤ 0.15) reveal a splitting of a single, first-order transition for y≤ 0.11 into two transitions for y ≤ 0.13. Most strikingly, all measurements on identical samples Fe1.13Te consistently indicate that, upon cooling, the magnetic transition at TN precedes the first-order structural transition at a lower temperature Ts. The structural transition in turn coincides with a change in the character of the magnetic structure. The LTE measurements along the crystallographic c axis display a small distortion close to TN due to a lattice striction as a consequence of magnetic ordering, and a much larger change at Ts. The lattice symmetry changes, however, only below Ts as indicated by powder x-ray diffraction. This behavior is in stark contrast to the sequence in which the phase transitions occur in Fe pnictides.
Details
Original language | English |
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Article number | 174506 |
Journal | Physical review. B |
Volume | 84 |
Issue number | 17 |
Publication status | Published - 8 Nov 2011 |
Peer-reviewed | Yes |
External IDs
Scopus | 82455217203 |
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Keywords
ASJC Scopus subject areas
Keywords
- Magnetostriktion, Magnetische Struktur, Phasenübergang