Magnetic and electrical transport properties of the pyrochlore iridate Bi2-xCoxIr2O7

被引：7
作者：
Feng, Yuan [1 ]
Zhu, Shoujin [2 ]
Bian, Jian [1 ]
Chen, Feng [1 ]
Chen, Shiyun [3 ]
Ma, Cuiling [4 ]
Liu, Hui [1 ]
Fang, Baolong [1 ]
机构：
[1] Hefei Univ, Dept Math & Phys, Hefei 230601, Anhui, Peoples R China
[2] Sanlian Univ, Hefei 230601, Anhui, Peoples R China
[3] Hefei Univ, Analyt & Testing Ctr, Hefei 230601, Anhui, Peoples R China
[4] Hefei Univ, Dept Architecture & Civil Engn, Hefei 230601, Anhui, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2018年 / 451卷
关键词：
Pyrochlore iridate; Frustrated magnetism; Grain boundary effects; Electron-electron scattering; RKKY INTERACTION; SYSTEMS;
D O I：
10.1016/j.jmmm.2017.11.071
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present paper, we have studied the magnetic order and electrical transport properties of frustrated magnet Bi2-xCoxIr2O7 (x = 0, 0.2, 0.4, 0.6) polycrystalline. The behavior of the electrical resistivity above 50 K in the composites emanate from the electron-electron scattering processes. Grain boundary effects play a dominant role in the conduction process. It is also found from M-T data that the antiferromagnetic interaction and frustration enhances with increasing content of Co. Effective magnetic moments show a possibility of mixed valence state of Co (Co3+ and Co4+). The M-H data of doped samples taken at 2 K show hysteresis loops, which suggests the existence of ferromagnetic interaction originated from canted antiferromagnetic state. The magnetic behavior results from the competition between ferromagnetic and antiferromagnetic interaction at each magnetic site. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：283 / 287
页数：5
相关论文
共 28 条
[11]   Phase-Sensitive Observation of a Spin-Orbital Mott State in Sr2IrO4 [J].
Kim, B. J. ;
Ohsumi, H. ;
Komesu, T. ;
Sakai, S. ;
Morita, T. ;
Takagi, H. ;
Arima, T. .
SCIENCE, 2009, 323 (5919) :1329-1332
[12]   Infrared study of the electronic structure of the metallic pyrochlore iridate Bi2Ir2O7 [J].
Lee, Y. S. ;
Moon, S. J. ;
Riggs, Scott C. ;
Shapiro, M. C. ;
Fisher, I. R. ;
Fulfer, Bradford W. ;
Chan, Julia Y. ;
Kemper, A. F. ;
Basov, D. N. .
PHYSICAL REVIEW B, 2013, 87 (19)
[13]   Structural, magnetic and electrical properties in the pyrochlore oxide Bi2-xCaxIr2O7-δ [J].
Liang, Dandan ;
Liu, Hui ;
Liu, Ning ;
Ling, Langsheng ;
Han, Yuyan ;
Zhang, Lei ;
Zhang, Changjin .
CERAMICS INTERNATIONAL, 2016, 42 (03) :4562-4566
[14]   Magnetic order, spin dynamics and transport properties of the pyrochlore iridate Y2Ir2O7 [J].
Liu, Hui ;
Tong, Wei ;
Ling, Langsheng ;
Zhang, Shile ;
Zhang, Ranran ;
Zhang, Lei ;
Pi, Li ;
Zhang, Changjin ;
Zhang, Yuheng .
SOLID STATE COMMUNICATIONS, 2014, 179 :1-5
[15]   Metal-Insulator Transitions in Pyrochlore Oxides Ln2Ir2O7 [J].
Matsuhira, Kazuyuki ;
Wakeshima, Makoto ;
Hinatsu, Yukio ;
Takagi, Seishi .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2011, 80 (09)
[16]   Metallic spin-liquid behavior of the geometrically frustrated Kondo lattice Pr2Ir2O7 [J].
Nakatsuji, S ;
Machida, Y ;
Maeno, Y ;
Tayama, T ;
Sakakibara, T ;
van Duijn, J ;
Balicas, L ;
Millican, JN ;
Macaluso, RT ;
Chan, JY .
PHYSICAL REVIEW LETTERS, 2006, 96 (08)
[17]   Grain boundary effects on the electrical and magnetic properties of Pr2/3Ba1/3MnO3 and La2/3Ca1/3MnO3 manganites [J].
Panwar, Neeraj ;
Sen, Vikram ;
Pandya, D. K. ;
Agarwal, S. K. .
MATERIALS LETTERS, 2007, 61 (27) :4879-4883
[18]   Strong magnetic instability in correlated metallic Bi2Ir2O7 [J].
Qi, T. F. ;
Korneta, O. B. ;
Wan, Xiangang ;
DeLong, L. E. ;
Schlottmann, P. ;
Cao, G. .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2012, 24 (34)
[19]   STRONGLY GEOMETRICALLY FRUSTRATED MAGNETS [J].
RAMIREZ, AP .
ANNUAL REVIEW OF MATERIALS SCIENCE, 1994, 24 :453-480
[20]   Determination of long-range all-in-all-out ordering of Ir4+ moments in a pyrochlore iridate Eu2Ir2O7 by resonant x-ray diffraction [J].
Sagayama, H. ;
Uematsu, D. ;
Arima, T. ;
Sugimoto, K. ;
Ishikawa, J. J. ;
O'Farrell, E. ;
Nakatsuji, S. .
PHYSICAL REVIEW B, 2013, 87 (10)
123