Structural and magnetic properties of Gd1-xPrxMn2Si2 silicides

Kilic A., Kervan S., Gencer A.

JOURNAL OF ALLOYS AND COMPOUNDS, cilt.372, sa.1-2, ss.25-29, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 372 Sayı: 1-2
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.jallcom.2003.09.149
  • Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.25-29
  • Anahtar Kelimeler: rare earth compounds, transition metal compounds, phase transitions, AC susceptibility, differential scanning calorimetry (DSC), X-ray diffraction (XRD), 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 Gd1-xPrxMn2Si2 (0 less than or equal to x less than or equal to 1) compounds. All compounds investigated crystallize in the body-centred tetragonal ThCr2Si2-type structure with the space group 14/mmm. Substitution of Pr for Gd leads to a linear increase of the lattice constants and the unit cell volume. The lattice constants and the unit cell volume obey Vegard's law. At the Curie temperature T-C(Gd), the Gd sublattice orders and reconfigures the ordering in the Mn sublattice. This temperature becomes depressed and disappears with increasing Pr content x. The Met temperature T-N(Mn) determined by DSC technique decreases linearly with increasing Pr content x. The results are summarized in the x-T magnetic phase diagram. (C) 2003 Elsevier B.V. All rights reserved.