Chin. Phys. Lett.  2015, Vol. 32 Issue (08): 087101    DOI: 10.1088/0256-307X/32/8/087101
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Anisotropic Transport and Magnetic Properties of Charge-Density-Wave Materials RSeTe2 (R = La, Ce, Pr, Nd)
WANG Pei-Pei1, LONG Yu-Jia1,2, ZHAO Ling-Xiao1, CHEN Dong1,2, XUE Mian-Qi1, CHEN Gen-Fu1,3**
1Institute of Physics, and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190
2Department of Physics, Renmin University of China, Beijing 100872
3Collaborative Innovation Center of Quantum Matter, Beijing 100190
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WANG Pei-Pei, LONG Yu-Jia, ZHAO Ling-Xiao et al  2015 Chin. Phys. Lett. 32 087101
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Abstract Single crystals of RSeTe2 (R = La, Ce, Pr, Nd) are synthesized using LiCl/RbCl flux. Transport and magnetic properties in the directions parallel and perpendicular to the a–c plane are investigated. We find that the resistivity anisotropy ρ⊥/ρ|| lies in the range 486–615 for different compounds at 2 K, indicating the highly two-dimensional character. In both the orientations, the charge-density-wave transitions start near TCDW=284(3) K, 316(3) K, 359(3) K for NdSeTe2, PrSeTe2, CeSeTe2, respectively, with a considerable increase in dc resistivity. While for LaSeTe2, no obvious resistivity anomaly is observed up to 380 K. The value of TCDW increases monotonically with the increasing lattice parameters. Below TCDW, slight anomalies can be observed in NdSeTe2, PrSeTe2 and CeSeTe2 with onset temperature at 193(3) K, 161(3) K, 108(3) K, respectively, decreasing as lattice parameters increase. Magnetic susceptibility measurements show that the valence state of rare earth ions are trivalence in these compounds. Antiferromagnetic-type magnetic order is formed in CeSeTe2 at 2.1 K, while no magnetic transition is observed in PrSeTe2 and NdSeTe2 down to 1.8 K.
Received: 14 April 2015      Published: 02 September 2015
PACS:  71.45.Lr (Charge-density-wave systems)  
  72.15.-v (Electronic conduction in metals and alloys)  
  75.30.Gw (Magnetic anisotropy)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/32/8/087101       OR      https://cpl.iphy.ac.cn/Y2015/V32/I08/087101
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WANG Pei-Pei
LONG Yu-Jia
ZHAO Ling-Xiao
CHEN Dong
XUE Mian-Qi
CHEN Gen-Fu
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