中国物理B ›› 2015, Vol. 24 ›› Issue (9): 97501-097501.doi: 10.1088/1674-1056/24/9/097501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Growth and characterization of CaCu3Ru4O12 single crystal

王蓉娟a, 朱媛媛a, 王理a, 刘雍a, 石兢a, 熊锐a, 王俊峰b   

  1. a Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China;
    b Wuhan High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2015-04-22 修回日期:2015-05-25 出版日期:2015-09-05 发布日期:2015-09-05
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2012CB821404), the National Natural Science Foundation of China (Grant Nos. 51172166 and 61106005), the National Science Fund for Talent Training in Basic Science of China (Grant No. J1210061), and the Doctoral Fund of Ministry of Education of China (Grant No. 20110141110007).

Growth and characterization of CaCu3Ru4O12 single crystal

Wang Rong-Juan (王蓉娟)a, Zhu Yuan-Yuan (朱媛媛)a, Wang Li (王理)a, Liu Yong (刘雍)a, Shi Jing (石兢)a, Xiong Rui (熊锐)a, Wang Jun-Feng (王俊峰)b   

  1. a Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China;
    b Wuhan High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2015-04-22 Revised:2015-05-25 Online:2015-09-05 Published:2015-09-05
  • Contact: Liu Yong, Shi Jing E-mail:yongliu@whu.edu.cn;jshi@whu.edu.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2012CB821404), the National Natural Science Foundation of China (Grant Nos. 51172166 and 61106005), the National Science Fund for Talent Training in Basic Science of China (Grant No. J1210061), and the Doctoral Fund of Ministry of Education of China (Grant No. 20110141110007).

摘要:

High-quality single crystals of A-site ordered perovskite oxides CaCu3Ru4O12 were synthesized by flux method with CuO serving as a flux. The typical size of these single crystals was around 1× 1× 1 mm3 and the lattice constant was determined to be 7.430± 0.0009 Å by using x-ray single crystal diffraction. The surfaces of the samples were identified to be (100) surface. The high quality of the single crystal samples was confirmed by the rocking curve data which have a full width at half maximum of approximately 0.02 degree. The x-ray photoelectron spectroscopy measurement was performed and the temperature-dependent specific heat, magnetic susceptibility, and electric resistivity were measured along the [100] direction of the single crystals. All these measurements showed that the physical properties of CaCu3Ru4O12 single crystals are similar to that of polycrystals. However, the single crystals have a lower Curie susceptibility tail and a smaller residual resistivity than polycrystals, which indicates that the amount of paramagnetic impurities can be controlled by tuning the number of defects in CaCu3Ru4O12 samples.

关键词: heavy fermion, single crystal growth, d electron oxides, perovskites

Abstract:

High-quality single crystals of A-site ordered perovskite oxides CaCu3Ru4O12 were synthesized by flux method with CuO serving as a flux. The typical size of these single crystals was around 1× 1× 1 mm3 and the lattice constant was determined to be 7.430± 0.0009 Å by using x-ray single crystal diffraction. The surfaces of the samples were identified to be (100) surface. The high quality of the single crystal samples was confirmed by the rocking curve data which have a full width at half maximum of approximately 0.02 degree. The x-ray photoelectron spectroscopy measurement was performed and the temperature-dependent specific heat, magnetic susceptibility, and electric resistivity were measured along the [100] direction of the single crystals. All these measurements showed that the physical properties of CaCu3Ru4O12 single crystals are similar to that of polycrystals. However, the single crystals have a lower Curie susceptibility tail and a smaller residual resistivity than polycrystals, which indicates that the amount of paramagnetic impurities can be controlled by tuning the number of defects in CaCu3Ru4O12 samples.

Key words: heavy fermion, single crystal growth, d electron oxides, perovskites

中图分类号:  (Valence fluctuation, Kondo lattice, and heavy-fermion phenomena)

  • 75.30.Mb
81.10.-h (Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation) 71.27.+a (Strongly correlated electron systems; heavy fermions) 74.70.Pq (Ruthenates)