标题：Properties of Nd Doped La0.5Ba0.5CoO3 Pervoskite
作者：Wang, Junhua; Wang, Zhenhua; Huang, Baoxin; Yu, Yang; Zhang, Ruzhen; Liu, Yihua
作者机构：[Wang, Junhua; Huang, Baoxin; Yu, Yang] Weifang Univ, Dept Phys & Optoelect Engn, Shandong Prov Key Lab Multiphoton Entanglement &, Weifang, Peoples R 更多
会议名称：International Conference on Electronical, Mechanical and Materials Engineering (ICE2ME)
会议日期：JAN 20-21, 2019
来源：PROCEEDINGS OF THE 2019 INTERNATIONAL CONFERENCE ON ELECTRONICAL, MECHANICAL AND MATERIALS ENGINEERING (ICE2ME 2019)
关键词：La0.5-xNdxBa0.5CoO3; immediate spin state; noncollinear spin structure;; electron transport
摘要：The properties of La0.5-xNdxBa0.5CoO3 (0 <= x <= 0.425) has been investigated. All samples show a cubic structure at room temperature. The Curie temperature T-C and the estimated molecular magnetic moment of the samples at 5K decrease monotonically with increasing Nd-doping level. The results are discussed in terms of the double exchange (DE) interaction associated with the variation of Co-O bond length and Co-O bond angle due to the substitution of smaller Nd3+ ions for larger La3+ ions. At low temperature, the ferromagnetic (FM) interaction is greatly suppressed by the Nd-doping, illustrating a special noncollinear spin structure. The spin state of Co ions derived from the Curie constant is not affected by the Nd doping and remains an intermediate spin state. The electric resistance measurements show that the conduction of the materials belongs to the thermal activation process below T-C, while it belongs to the variable range hopping conduction of polarons over T-C except for parent La0.5Ba0.5CoO3.