Thermal expansion of Mn2−xCrxSb single crystals
| Autor: | J. Engelhardt, A. Kattwinkel, M. Asen-Palmer, Eberhard Gmelin, K. Bärner, Ch. Kleeberg |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
010302 applied physics
Phase transition Condensed matter physics Chemistry Atomic force microscopy Mechanical Engineering Metals and Alloys First order Magnetic hysteresis 01 natural sciences Thermal expansion Crystallography Mechanics of Materials Ferrimagnetism 0103 physical sciences Materials Chemistry Antiferromagnetism Spin-flip 010306 general physics |
| Zdroj: | Journal of Alloys and Compounds. 282:32-37 |
| ISSN: | 0925-8388 |
| Popis: | The thermal expansion Δ l / l has been measured and the thermal expansion coefficient α determined as a function of temperature and in the crystalline a - and c -directions of three Mn 2− x Cr x Sb single crystals, x =0.10, 0.05, 0.03. In both lattice directions α is different in the antiferromagnetic (afm) and ferrimagnetic (fi) phases (for example, x =0.03: α a =2.5×10 −5 K −1 ; T ≤ T s , α a =5×10 −5 K −1 ; T ≥ T s ), suggesting that the first-order afm–fi phase transition ( T s ) in these crystals should be described as a triggered coupled spin–lattice phase transition rather than as driven by lattice entropy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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