文献类型：期刊文献

英文题名：Dielectric and ferroelectric properties of Nd3Fe5O12

作者：Zhang, Tingsong[1]; Zhang, Chenyang[2]; Yuan, Hongming[3]; Xu, Mingze[1]

第一作者：Zhang, Tingsong

通讯作者：Xu, Mingze

机构：[1] International Joint Research Center for Nanophotonics and Biophotonics, School of Science, Changchun University of Science and Technology, Changchun, 130022, China; [2] College of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang, 453003, China; [3] State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China

第一机构：International Joint Research Center for Nanophotonics and Biophotonics, School of Science, Changchun University of Science and Technology, Changchun, 130022, China

通讯机构：[1]International Joint Research Center for Nanophotonics and Biophotonics, School of Science, Changchun University of Science and Technology, Changchun, 130022, China

年份：2020

卷号：305

外文期刊名：Solid State Communications

收录：EI(收录号：20194307566369);Scopus(收录号：2-s2.0-85073498233)

语种：英文

外文关键词：Dielectric relaxation - Magnetism - Rare earths - Iron compounds - Dipole moment - Electric dipole moments - Iron - Ferroelectricity - Garnets - Neodymium compounds

摘要：Multiferroics have attracted research interest for decades due to their potential applications. Multiferroics are relatively scarce due to the mutual exclusivity between magnetic and ferroelectric properties. New room-temperature multiferroics are looking forward to be exploited. Room-temperature multiferroic properties have been observed in a new rare-earth iron garnet (REIG), Nd3Fe5O12 (NdIG). The dielectric properties of NdIG over a wide temperature range (300 K–650 K) at different frequencies (100 Hz–1 MHz) and in the temperature range from 70 K to 300 K at 100 Hz are investigated herein. The results show that this material has two dielectric relaxations in the temperature range from 290 K to 525 K and a dielectric anomaly around the magnetic ordering temperature (565 K). The first dielectric relaxation in the temperature range from 290 K to 500 K is attributed to the conduction with an activation energy of 0.75 eV. The other dielectric relaxation in an elevated temperature range has an activation energy of 0.87 eV, which originates from the inhomogeneous structure. Furthermore, the ferroelectric polarization of approximately 28 μC/m2 at 77 K is determined by the positive-up-negative-down method and induced by the effective magnetic field created by the iron sublattice magnetic ordering and electric-dipole moments of the neodymium ions. ? 2019 Elsevier Ltd