Selected properties of surface modified GaxFe3-xO4 with 0≤x≤1.5

IF 1.3 4区材料科学 Q3 CRYSTALLOGRAPHY

Phase Transitions Pub Date : 2022-12-31 DOI:10.1080/01411594.2022.2159406

M. Orzechowska, K. Rećko, D. Soloviov, U. Klekotka, M. Biernacka, D. Satuła, W. Olszewski, B. Kalska-Szostko, A. Beskrovnyy, K. Szymański

引用次数: 1

Abstract

ABSTRACT The influence of the surface modification on the magnetism of 4–14 nm sized core and core/shell gallium ferrites obtained by different preparation methods (Massart’s and thermal decomposition from acetylacetonates) was studied. The physical properties of GaxFe3-xO4 were investigated in a wide range of Ga admixtures 0 ≤ x ≤ 1.5. Ga ions location at 8a or/and 16d positions of a spinel structure depends on the synthesis method and has a pronounced effect on the superparamagnetic properties of nanoparticles. Magnetization and Mössbauer experiments show the dominant superparamagnetic contribution for the nanoparticles with x > 0.8 with the blocking temperature TB significantly below 200 K. Surface-modified nanoferrites disclosed spontaneous magnetization that does not exceed 60 emu/g.

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选择了0≤x≤1.5的表面改性GaxFe3-xO4的性能

研究了不同制备方法(Massart法和热分解法)制备的4-14 nm核铁氧体和核/壳铁氧体的表面改性对磁性的影响。在0≤x≤1.5的Ga掺合料范围内研究了GaxFe3-xO4的物理性质。Ga离子在尖晶石结构8a或/和16d位置的位置取决于合成方法，并且对纳米粒子的超顺磁性有显著影响。磁化和Mössbauer实验表明，在阻断温度TB显著低于200 K时，x > 0.8的纳米粒子的超顺磁性贡献占主导地位。表面改性纳米铁氧体的自发磁化强度不超过60emu /g。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Phase Transitions 物理-晶体学

CiteScore

3.00

自引率

6.20%

发文量

审稿时长

1.4 months

期刊介绍： Phase Transitions is the only journal devoted exclusively to this important subject. It provides a focus for papers on most aspects of phase transitions in condensed matter. Although emphasis is placed primarily on experimental work, theoretical papers are welcome if they have some bearing on experimental results. The areas of interest include: -structural phase transitions (ferroelectric, ferroelastic, multiferroic, order-disorder, Jahn-Teller, etc.) under a range of external parameters (temperature, pressure, strain, electric/magnetic fields, etc.) -geophysical phase transitions -metal-insulator phase transitions -superconducting and superfluid transitions -magnetic phase transitions -critical phenomena and physical properties at phase transitions -liquid crystals -technological applications of phase transitions -quantum phase transitions Phase Transitions publishes both research papers and invited articles devoted to special topics. Major review papers are particularly welcome. A further emphasis of the journal is the publication of a selected number of small workshops, which are at the forefront of their field.