Magnetodielectric effect in a metamaterial consisting of xerogel with embedded ε-Fe2O3 iron oxide nanoparticles

被引：5

作者：

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

Balaev, D. A. ^{[1
]}

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

Yakushhkin, S. S. ^{[2
]}

Kirillov, V. L. ^{[2
]}

Martyanov, O. N. ^{[2
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Kiresnky Inst Phys, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia

[2] Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia

来源：

SOLID STATE COMMUNICATIONS | 2019年 / 289卷

基金：

俄罗斯科学基金会;

关键词：

MAGNETIC-PROPERTIES; HIGH-TEMPERATURE; PHASE; RAMAN;

D O I：

10.1016/j.ssc.2018.11.020

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The epsilon-Fe2O3 iron oxide is a fairly rare polymorphic modification, which only exists in the form of nanoparticles embedded, as a rule, into a silica gel matrix. This magnetically ordered iron oxide, which exhibits a significant room-temperature coercivity, is a ferroelectric; therefore, the magnetoelectric and magnetodielectric properties of this material evoke keen interest. In this work, we investigate the magnetodielectric (MD) effect in a metamaterial consisting of xerogel SiO2 with embedded epsilon-Fe2O3 nanoparticles 9 nm in size on average in a concentration of 20 mass.%. This bulk material exhibits the MD effect in a wide temperature range. The temperature behavior of the permittivity is related to the magnetic state of the epsilon-Fe2O3 oxide, which undergoes the magnetic transition from the magnetically hard to magnetically soft phase in the temperature range of 80-150 K, indicating the interplay of the epsilon-Fe2O3 magnetic and charge subsystems.

引用

页码：27 / 29

页数：3

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