Competing magnetic interactions in rare-earth manganese silicides and germanides

Duman E., Acet M., Dincer I., Elmali A., Elerman Y.

Journal of Magnetism and Magnetic Materials, cilt.309, sa.1, ss.40-53, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 309 Sayı: 1
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.jmmm.2006.06.010
  • Dergi Adı: Journal of Magnetism and Magnetic Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.40-53
  • Anahtar Kelimeler: rare-earth magnetism, magnetization, competing magnetic interaction, magnetic phase diagram, 0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1 SOLID-SOLUTION, DOMINANT ANTIFERROMAGNETIC COMPONENTS, NEUTRON-DIFFRACTION, PHASE-TRANSITIONS, CRYSTAL-STRUCTURE, RMN2GE2 COMPOUNDS, EXCHANGE INTERACTION, TERNARY SILICIDES, MN SUBLATTICE, SYSTEM
  • Ankara Üniversitesi Adresli: Hayır

Özet

We have investigated the magnetic properties of Rx R1 - x′ Mn2 X2 (X: Si, Ge) for various combinations of rare-earth elements R and R′ by examining the evolution of the features in the temperature dependence of the low-field magnetization. By making use of the known magnetic structure of the parent compositions x = 0 and 1, the results of low-field magnetization measurements are interpreted for intermediate compositions to give information on their magnetic structure. We find antiferromagnetic-ferromagnetic (AF-FM) transitions, whereby the transition can be sharp or evolve over a considerable temperature range. We examine the magnetic transition temperatures as a function of the tetragonal unit cell parameter a and find that the critical spacings associated with interlayer AF-FM transitions are different in the silicides and germanides. © 2006 Elsevier B.V. All rights reserved.