| Autor: |
Gnezdilov, V., Lemmens, P., Zvyagin, A. A., Cheranovskii, V. O., Lamonova, K., Pashkevich, Yu. G., Kremer, R. K., Berger, H. |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. B 78, 184407 (2008) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.78.184407 |
| Popis: |
We report magnetic susceptibility, specific heat, and Raman scattering investigations of alpha-TeVO4 containing V-O edge-sharing chains. These chains promote a system of ferromagnetic/antiferromagnetic spin-1/2 Heisenberg alternating exchange chains with pronounced spin frustration. The magnetic susceptibility and Raman scattering evidence a crossover at T* = 85 K with different slopes of the reciprocal susceptibility and a magnetic phase transition into a long-range-ordered state at Tc = 16 K. From Raman scattering data a strong mutual coupling between lattice and magnetic degrees of freedom is deduced. A comparison to model calculations and prior Raman scattering on other chain systems yield a plausible interpretation of the microscopic mechanism for the crossover behavior. |
| Databáze: |
arXiv |
| Externí odkaz: |
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