tailieunhanh - Crystal structure and magnetic properties of TbTSn compounds (T = Pt, Rh)
The TbTSn compounds (T = Pt, Rh) have been prepared by arc-melting in purified Ar atmosphere. Crystal structures were studied by X-ray powder diffraction. The Rietveld analysis shows the single phase in hexagonal ZrNiAl-type structure for TbPtSn and TbRhSn compounds. Magnetic properties and specific heat measured by mean of Physical Properties Measurement System (PPMS) demonstrated the phase magnetic transition at Néel temperature TN. | VNU Journal of Science: Mathematics – Physics, Vol. 34, No. 2 (2018) 32-36 Crystal Structure and Magnetic Properties of TbTSn Compounds (T = Pt and Rh) Ho Thi Doan1, Vuong Van Hiep1, Nguyen Khac Thuan2, Do Thi Kim Anh1,* 1 Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Hanoi, Vietnam Faculty of Engineering Physics and Nanotechnology, VNU University of Enginerring and Technology, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam 2 Received 17 May 2018 Accepted 28 May 2018 Abstract: The TbTSn compounds (T = Pt, Rh) have been prepared by arc-melting in purified Ar atmosphere. Crystal structures were studied by X-ray powder diffraction. The Rietveld analysis shows the single phase in hexagonal ZrNiAl-type structure for TbPtSn and TbRhSn compounds. Magnetic properties and specific heat measured by mean of Physical Properties Measurement System (PPMS) demonstrated the phase magnetic transition at Néel temperature TN. Keywords: Crystal structure, Magnetic properties. 1. Introduction The crystal structure, specific heat and magnetic properties of the equiatomic ternary compounds of RMX have been studied (R = rare earth, M = transition metal and X = Si, Ge, Al, In and Sn) [1-3]. Ternary equiatomic rare-earth R = Ce, Pr, Nd compounds RMX crystallized in the orthorhombic TiNiSi-type structure (space group: Pnma) [4]. Among the RMX compounds, Tb compounds TbNiSn and TbRhGe exhibit strongly anisotropic physical properties reflecting their crystal symmetry. The existence of successive magnetic transitions with temperature as well as the multistep metamagnetism under high field has been clarified for TbNiSn and TbRhGe single crystals [5–10]. For another isostructural compound TbPdSn, the results of bulk magnetic measurements on polycrystalline samples have been reported so far [11–13]. In this studies, we present crystal structure, specific heat and magnetic properties of TbPtSn, TbPdSn, TbNiSn compounds at low temperature. _ Corresponding author. Tel.: .
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