Neutron Spectroscopy of the Atomic Dynamics of La2Zr2O7 at Fluorite-Pyrochlore Structural Transformations

被引：3

作者：

Savchenkov, P. S. ^{[1
,2
]}

Goremychkin, E. A. ^{[3
]}

Popov, V. V. ^{[1
,2
]}

Shapir, B. L. ^{[2
]}

Borisova, P. A. ^{[2
]}

Yastrebtsev, A. A. ^{[1
]}

Gaynanov, B. R. ^{[1
]}

Krasnov, M. P. ^{[1
]}

Menushenkov, A. P. ^{[1
]}

Alekseev, P. A. ^{[1
,2
]}

机构：

[1] Natl Res Nucl Univ MEPhI, Moscow Engn Phys Inst, Moscow 115409, Russia

[2] Kurchatov Inst, Natl Res Ctr, Moscow 123098, Russia

[3] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Moscow Region, Russia

来源：

JETP LETTERS | 2018年 / 108卷 / 08期

基金：

俄罗斯科学基金会;

关键词：

PHASE-TRANSITION; DIFFRACTION; SYSTEMS; ORDER;

D O I：

10.1134/S0021364018200134

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The formation of the structural and dynamic properties of La2Zr2O7 in the process of crystallization at the isothermal annealing of initially amorphous precursors obtained by the coprecipitation of corresponding salts has been studied by neutron spectroscopy. The existence of vibrational states characteristic of hydrogen, which is in one or another of the possible chemical states and is incorporated into a solid matrix, has been detected in the spectra of amorphous and fluorite phases. The DFT calculation of the phonon density of states has been performed to analyze the energy structure of experimental phonon spectra for various phases of the La2Zr2O7 compound. The amount of hydrogen in the fluorite phase has been estimated.

引用

页码：532 / 536

页数：5

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