Internal friction in thin-film ferrite bismuth with an amorphous structure

被引：3

作者：

Gridnev, S. A. ^{[1
]}

Kalinin, Yu. E. ^{[1
]}

Dybov, V. A. ^{[1
]}

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

Kashirin, M. A. ^{[1
]}

Tolstykh, N. A. ^{[1
]}

机构：

[1] Voronezh State Tech Univ, Voronezh 394006, Russia

[2] Voronezh State Tech Univ, Dept Solid State Phys, Voronezh, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 918卷

关键词：

Internal friction; Bismuth ferrite; Oxygen vacancies; a-relaxation; RELAXATION PROCESSES; SHEAR MODULUS; TEMPERATURE; TRANSITION; GLASSES; CRYSTAL; MECHANISMS; POLYMERS;

D O I：

10.1016/j.jallcom.2022.165610

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：

The internal friction spectra of an amorphous thin-film bismuth ferrite deposited on a silicon substrate were studied. The temperature dependence of mechanical losses near the glass transition temperature revealed a wide maximum of internal friction associated with alpha-relaxation of the amorphous structure. In this temperature region, two linear sections in the lnQ(-1) vs (1/T) dependence are observed with an intersection point at the glass transition temperature. According to the results of low-and high-temperature internal friction investigation of the amorphous bismuth ferrite in the alpha-relaxation region, the values of the migration energy and the formation energy of vacancies-like defects were estimated, which are equal to E-m = 0.80 +/- 0.08 eV and E-v = 0.88 +/- 0.08 eV, respectively. (C) 2022 Elsevier B.V. All rights reserved.

引用

页数：6

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