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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2003, Volume 77, Issue 11, Pages 747–752
(Mi jetpl2834)
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This article is cited in 45 scientific papers (total in 45 papers)
Electronic and structural transitions in NdFeO$_3$ orthoferrite under high pressures
A. G. Gavriliuka, I. A. Trojana, R. Boehlerb, M. I. Eremetsb, I. S. Lyubutinc, N. R. Serebryanayad a Institute for High Pressure Physics, Russian Academy of Sciences
b Max Planck Institute for Chemistry, Mainz
c Institute of Cristallography Russian Academy of Sciences, Moscow
d Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow
Abstract:
The effect of high pressure up to 65 GPa on the crystal structure and optical absorption spectra of NdFeO$_3$ orthoferrite single crystals is studied in diamond anvil cells. At $P\sim37.5\,$GPa, an electronic transition at which the optical absorption edge jumps from $\sim2.2$ to $\sim0.75\,$ eV is observed. The equation of state $V(P)$ is studied on the basis of the $X$-ray diffraction data obtained under pressure. This study reveals a first-order structural phase transition at $P\sim37\,$GPa with a jump of $\sim4\%$ in the unit cell volume. It is shown that the phase transition observed in rare-earth orthoferrites at 30-40 GPa is a transition of the insulator-to-semiconductor type.
Received: 05.05.2003
Citation:
A. G. Gavriliuk, I. A. Trojan, R. Boehler, M. I. Eremets, I. S. Lyubutin, N. R. Serebryanaya, “Electronic and structural transitions in NdFeO$_3$ orthoferrite under high pressures”, Pis'ma v Zh. Èksper. Teoret. Fiz., 77:11 (2003), 747–752; JETP Letters, 77:11 (2003), 619–624
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https://www.mathnet.ru/eng/jetpl2834 https://www.mathnet.ru/eng/jetpl/v77/i11/p747
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Abstract page: | 151 | Full-text PDF : | 62 | References: | 40 |
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