|
This article is cited in 4 scientific papers (total in 4 papers)
CONDENSED MATTER
Phase transition in Y$_3$Fe$_5$O$_{12}$ at high pressures observed by Raman spectroscopy
S. N. Aksenova, A. A. Mironovicha, I. S. Lyubutinb, A. G. Ivanovaab, I. A. Trojanbac, R. A. Sadykova, Siddharth S Saxena (Montu)d, A. G. Gavriliukacb a Institute for Nuclear Research, Russian Academy of Sciences, Moscow, 117312 Russia
b Shubnikov Institute of Crystallography, Federal Scientific Research Centre Crystallography and Photonics,
Russian Academy of Sciences, Moscow, 119333 Russia
c Immanuel Kant Baltic Federal University, Kaliningrad, 236041 Russia
d Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
Abstract:
The vibrational properties of yttrium iron garnet Y$_3$Fe$_5$O$_{12}$ at a high quasihydrostatic pressure are studied by the Raman spectroscopy method. Raman spectra are measured in a high-pressure diamond anvil cell in the pressure range of $0$–$72$ GPa at room temperature. A fundamental change in the character of spectra with the disappearance of sharp peaks is detected near $\sim50$ GPa. This confirms a phase transition from the crystalline to amorphous state, which was previously detected by other experimental methods. This transition is accompanied by spin crossover in Fe$^{3+}$ ions, which transit from the high-spin (HS, $S = 5/2$) to low-spin (LS, $S=1/2$) state. The pressure dependences of phonon modes in Y$_3$Fe$_5$O$_{12}$ are measured from atmospheric pressure to the critical phase transition pressure.
Received: 07.11.2021 Revised: 10.11.2021 Accepted: 10.11.2021
Citation:
S. N. Aksenov, A. A. Mironovich, I. S. Lyubutin, A. G. Ivanova, I. A. Trojan, R. A. Sadykov, Siddharth S Saxena (Montu), A. G. Gavriliuk, “Phase transition in Y$_3$Fe$_5$O$_{12}$ at high pressures observed by Raman spectroscopy”, Pis'ma v Zh. Èksper. Teoret. Fiz., 114:12 (2021), 802–811; JETP Letters, 114:12 (2021), 742–750
Linking options:
https://www.mathnet.ru/eng/jetpl6572 https://www.mathnet.ru/eng/jetpl/v114/i12/p802
|
Statistics & downloads: |
Abstract page: | 63 | References: | 11 | First page: | 9 |
|