Synthesis and Magnetic Properties of RMn<SUB>2</SUB>Si<SUB>2</SUB>(R=Y, Nd, Gd)and YNi<SUB>2</SUB>Si<SUB>2</SUB>

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  • ＲＭｎ２Ｓｉ２（Ｒ＝Ｙ，Ｎｄ，Ｇｄ）とＹＮｉ２Ｓｉ２の合成と磁性
  • RMn2Si2 R Y,Nd,Gd ト YNi2Si2 ノ ゴウセイ ト ジセ

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A series of the RMn2Si2 (R=Y, Nd and Gd) were prepared by heating the mixed powder with the stoichiometric composition in an evacuated silica tube, and YNi2Si2 was synthesized under high temperature and pressure conditions. The crystal structure of these compounds was closely identified with the bodycentered tetragonal ThCr2Si2 type structure. Results of magnetic measurements showed that all RMn2Si2 (R=Y, Nd and Gd) compounds were antiferromagnetic with TN=514K for YMn2Si2, 386K for NdMn2Si2 and 477K for GdMn2Si2. YNi2Si2 was Pauli-paramagnetic indicating that the 3d shells of Ni atoms were fully occupied by the electrons transferred from Si atoms.

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