X-ray absorption near edge structure and first-principles spectral investigations of cationic disorder in MgAl2O4 induced by swift heavy ions

被引：7

作者：

Yoshioka, S. ^{[1
]}

Tsuruta, K. ^{[1
]}

Yamamoto, T. ^{[1
]}

Yasuda, K. ^{[1
]}

Matsumura, S. ^{[1
]}

Ishikawa, N. ^{[2
]}

Kobayashi, E. ^{[3
]}

机构：

[1] Kyushu Univ, Dept Appl Quantum Phys & Nucl Engn, Fukuoka 8190395, Japan

[2] Japan Atom Energy Agcy, Nucl Sci & Res Ctr, Ibaraki 3191184, Japan

[3] Kyushu Synchrotron Light Res Ctr, Saga 8410005, Japan

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2018年 / 20卷 / 07期

关键词：

HIGH-TEMPERATURE; SPINEL; MICROSTRUCTURE; THERMODYNAMICS; DIFFRACTION; TRANSITION; CRYSTAL; AL-27;

D O I：

10.1039/c7cp07591j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cationic disorder in the MgAl2O4 spinel induced by swift heavy ions was investigated using the X-ray absorption near edge structure. With changes in the irradiation fluences of 200 MeV Xe ions, the Mg K-edge and Al K-edge spectra were synchronously changed. The calculated spectra based on density function theory indicate that the change in the experimental spectra was due to cationic disorder between Mg in tetrahedral sites and Al in octahedral sites. These results suggest a high inversion degree to an extent that the completely random configuration is achieved in MgAl2O4 induced by the high density electronic excitation under swift heavy ion irradiation.

引用

页码：4962 / 4969

页数：8

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