Thermal Conductivity and Magnetic Phase Diagram of CuB2O4
| Autor: | Yutaka Fujii, Meiro Chiba, Norio Kobayashi, Yoji Koike, G. A. Petrakovskii, Hikomitsu Kikuchi, Tadashi Adachi, Naoki Sugawara, Kazutaka Kudo, Takayuki Kawamata, Leonard N. Bezmaternykh, Takashi Noji, Mikhail Popov, S. M. Haidar |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) General Physics and Astronomy FOS: Physical sciences Magnetic phase diagram 01 natural sciences 010305 fluids & plasmas Magnetic field Condensed Matter - Strongly Correlated Electrons Thermal conductivity Zero field 0103 physical sciences 010306 general physics |
| DOI: | 10.48550/arxiv.1910.00179 |
| Popis: | We have measured temperature and magnetic field dependences of the thermal conductivity along the c-axis, kc, and that along the [110] direction, k110, of CuB2O4 single crystals in zero field and magnetic fields along the c-axis and along the [110] direction. It has been found that the thermal conductivity is nearly isotropic and very large in zero field and that the thermal conductivity due to phonons is dominant in CuB2O4. The temperature and field dependences of kc and k110 have markedly changed at phase boundaries in the magnetic phase diagram, which has been understood to be due to the change of the mean free path of phonons caused by the change of the phonon-spin scattering rate at the phase boundaries. It has been concluded that thermal conductivity measurements are very effective for detecting magnetic phase boundaries. Comment: 18 pages, 6 figures |
| Databáze: | OpenAIRE |
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