文献类型：期刊文献

英文题名：Grain size and Fe2+ concentration-dependent magnetic, dielectric, and magnetodielectric properties of Y3Fe5O12 ceramics

作者：Wu, Huarui[1,2,3];Huang, Fengzhen[1,2,4];Lu, Xueliang[1,2];Xu, Tingting[1,2];Lu, Xiaomei[1,2,4];Ti, Ruixia[1,2];Jin, Yaming[1,2];Zhu, Jinsong[1,2,4]

第一作者：Wu, Huarui;吴花蕊

通讯作者：Huang, FZ[1]

机构：[1]Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China;[2]Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China;[3]Xinxiang Univ, Coll Phys & Elect Engn, Xinxiang 453003, Peoples R China;[4]Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

第一机构：Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

通讯机构：[1]corresponding author), Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China.

年份：2016

卷号：213

期号：1

起止页码：146-153

外文期刊名：PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE

收录：;EI(收录号：20155201731466);Scopus(收录号：2-s2.0-84954368065);WOS:【SCI-EXPANDED(收录号:WOS:000367980500022)】；

基金：This work was supported by National Natural Science Foundation of China (nos. 51225201 and 61271078), the 973 Project of MOST (no. 2015CB921201), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the Fundamental Research Funds for the Central Universities and the Fundamental and Frontier Research of Henan province (no. 142300410099).

语种：英文

外文关键词：dielectric relaxation; magnetism; magnetodielectric effect; YIG ceramics

摘要：Y3Fe5O12 ceramics are prepared by the solid state reaction method. Grain size and Fe2+ concentration-dependent magnetic, dielectric, and magnetodielectric properties are investigated systematically. It is found that grain size and Fe2+ concentration increase with increasing sintering temperature, which thus results in increased saturation magnetization while decreased coercive field and remanent magnetization. Three sets of dielectric relaxation are observed in temperature range from 10 to 500 K, which are considered to be originated from quantum tunneling effect of electrons, electron hopping between Fe2+ and Fe3+, and the migration of oxygen vacancies, respectively. Cole-Cole fitting results of relaxation II indicate that a correlation exists among the hopping electrons, and the correlation is strengthened as Fe2+ concentration increases, which in turn results in easier hopping process and decreased activation energy. More interesting, YIG ceramics sintered at 1350 degrees C show both considerable magnetic and dielectric properties at room temperature, opening a new window for the application of YIG as a possible multi-susceptibile single-phase material. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim