Spin-induced negative thermal expansion and spin–phonon coupling in van der Waals material CrBr3
| Autor: | N.M. Belozerova, D. P. Kozlenko, S. E. Kichanov, E. V. Lukin, O. N. Lis, B.N. Savenko |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Condensed matter physics Spintronics Phonon 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials symbols.namesake Negative thermal expansion Molecular vibration symbols Physics::Atomic and Molecular Clusters TA401-492 Curie temperature van der Waals force Atomic physics. Constitution and properties of matter 0210 nano-technology Spin (physics) Raman spectroscopy Materials of engineering and construction. Mechanics of materials QC170-197 |
| Zdroj: | npj Quantum Materials, Vol 6, Iss 1, Pp 1-5 (2021) |
| ISSN: | 2397-4648 |
| Popis: | The two-dimensional van der Waals (vdW) magnets retaining magnetic order in atomically thin limit demonstrate challenging physical phenomena and they are considered as prospective building blocks for construction of advanced spintronics and nanoelectronics devices. Here, we present experimental evidence for negative thermal expansion of lattice volume and vdW layers and strong spin–phonon coupling effects, caused by formation of the long-range ferromagnetic order in the vdW material CrBr3. The neutron and X-ray diffraction measurements revealed anomalous temperature variation of lattice parameters and interatomic distances and angles in the vicinity of Curie temperature (TC). A pronounced rise of the frequencies of the most of the observed vibrational modes and unusual reversal broadening of their full widths at half maximum below TC was found from Raman spectroscopy measurements. |
| Databáze: | OpenAIRE |
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