AC susceptibility, XRD and DSC studies of Sm1-xGdxMn2Si2 silicides

Kervan S., Kilic A., Gencer A.

PHYSICA B-CONDENSED MATTER, cilt.344, sa.1-4, ss.195-200, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 344 Sayı: 1-4
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.physb.2003.09.258
  • Dergi Adı: PHYSICA B-CONDENSED MATTER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.195-200
  • Anahtar Kelimeler: rare earth compounds, transition metal compounds, phase transitions, AC susceptibility, differential scanning, calorimetry (DSC), X-ray diffraction (XRD), MAGNETIC-PROPERTIES, NEUTRON-DIFFRACTION, SOLID-SOLUTION, RMN2GE2 COMPOUNDS, CRYSTAL-STRUCTURE, 0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1, RMN2SI2, SYSTEM, ND
  • Ankara Üniversitesi Adresli: Evet

Özet

X-ray powder diffraction, AC susceptibility and differential scanning calorimetry (DSC) studies were performed on the polycrystalline Sm1-xGdxMn2Si2 (0 less than or equal to x less than or equal to 1) compounds. All compounds investigated crystallize in the bodycentered tetragonal ThCr2Si2-type structure with the space group 14/mmm. Substitution of Gd for Sm leads to a linear decrease of the lattice constants and the unit cell volume. The lattice constants and the unit cell volume obey Vegard's law. At low temperatures, the rare earth sublattice orders and reconfigures the ordering in the Mn sublattice. The samples with x = 0.6 and 0.8 exhibit spin reorientation phenomenon. The Neel temperature T-N(Mn) determined by DSC technique and the Curie temperature T-C (RE) increase linearly with increasing Gd content x. The results are summarized in the x - T magnetic phase diagram. (C) 2003 Elsevier B.V. All rights reserved.