Formation, characterization and magnetic properties of maghemite γ-Fe2O3 nanoparticles in borate glasses

被引：9

作者：

Edelman, I. S. ^{[1
]}

Ivanova, O. S. ^{[1
]}

Petrakovskaja, E. A. ^{[1
]}

Velikanov, D. A. ^{[1
,2
]}

Tarasov, I. A. ^{[1
]}

Zubavichus, Y. V. ^{[3
]}

Trofimova, N. N. ^{[3
]}

Zaikovskii, V. I. ^{[4
,5
]}

机构：

[1] RAS, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

[2] Siberian Fed Univ, Krasnoyarsk 660036, Russia

[3] NRC Kurchatov Inst, Moscow 123182, Russia

[4] RAS, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia

[5] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 624卷

基金：

俄罗斯基础研究基金会;

关键词：

Nanostructures; Crystal structure and symmetry; Magnetic measurements; SUPERPARAMAGNETIC RESONANCE; HYSTERESIS LOOPS; EXCHANGE BIAS; IONS; MATRIX;

D O I：

10.1016/j.jallcom.2014.11.059

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：

A new type of nanocomposite materials based on maghemite, gamma- Fe2O3, nanoparticles dispersed in borate glasses co-doped with low contents of iron together with the larger radius element combinations: Y and Bi, or Sm and Pb, or Y and Pb is studied. Nanoparticles arise as a result of heat treatment of the glasses which gives them properties characteristic of magnetically ordered substances. Transmission electron microscopy and XRD show that only one magnetic phase, namely gamma-Fe2O3 nanoparticles, occurs in glasses subjected to the thermal treatment at 540 degrees C during 24 h independently on the doping element nature. At the same time doping element and their concentrations ratio in every combination affect the particles average size and glass magnetic properties, such as magnetization temperature dependences, Faraday rotation value and electron magnetic resonance spectrum characteristics. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：60 / 67

页数：8

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