Ferromagnetic induced in Cr-doped CeO2 particles

被引：26

作者：

Phokha, Sumalin ^{[1
]}

Prabhakaran, Dharmalingam ^{[2
]}

Boothroyd, Andrew ^{[2
]}

Pinitsoontorn, Supree ^{[1
]}

Maensiri, Santi ^{[3
]}

机构：

[1] Khon Kaen Univ, Fac Sci, Dept Phys, Khon Kaen 40002, Thailand

[2] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[3] Suranaree Univ Technol, Inst Sci, Sch Phys, Nakhon Ratchasima 30000, Thailand

来源：

MICROELECTRONIC ENGINEERING | 2014年 / 126卷

基金：

英国工程与自然科学研究理事会;

关键词：

Cr-doped CeO2; Dilute magnetic oxide; Ferromagnetism; Oxygen vacancies; F-center exchange; Superconducting quantum interference device; ROOM-TEMPERATURE FERROMAGNETISM; THIN-FILMS; MAGNETIC-PROPERTIES; CERIUM OXIDE; NANOSPHERES;

D O I：

10.1016/j.mee.2014.06.028

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This work reports the room-temperature ferromagnetism of Cr-doped CeO2 (Ce1-xSrxO2 when 0 <= x <= 0.07) particles prepared by solid state reaction. The precursors were calcined in air at 1350 degrees C for 10 h to obtain nanoparticles. The prepared samples were studied using X-ray diffraction (XRD), transmission electron microscopy (TEM), and superconducting quantum interference device (SQUID). The XRD results showed a single phase nature with cubic structure without any impurity phase for all Cr-doped CeO2 samples and the lattice distortion observed on shift of the diffraction peaks that causes from defects/oxygen vacancy. Room temperature (RI) ferromagnetism (FM) is observed in samples with a maximum saturation magnetization of 8.82 x 10(-4) emu/g at 2 kOe for x = 0.05. In addition, the RT-FM is enhanced after annealing in argon atmosphere at 700 degrees C for 3 h. The F-center exchange interaction has been proposed to play in the magnetic properties of Cr-doped CeO2 particles. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：93 / 98

页数：6

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