A study of SmMn2-xCoxGe2 (0 <= x <= 0.4) intermetallics by magnetic measurements
JOURNAL OF ALLOYS AND COMPOUNDS, cilt.396, sa.1-2, ss.1-5, 2005 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 396 Sayı: 1-2
- Basım Tarihi: 2005
- Doi Numarası: 10.1016/j.jallcom.2004.11.062
- Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.1-5
- Anahtar Kelimeler: rare-earth magnetism, magnetic measurements, layered magnetic structures, pinning, PHASE-TRANSITIONS, TEMPERATURE, SMMN2GE2
- Ankara Üniversitesi Adresli: Hayır
Özet
The magnetic properties of SmMn2-xCoxGe2 (0 <= x <= 0.4) were studied by field-cooled and zero-field-cooled (ZFC) magnetization measurements in the temperature range 5 K <= T <= 350 K in low external field (50 Oe). Substitution of Co for Mn leads to a linear decrease in the lattice constants a and c, c/a and the unit cell volume V. Co substitution strongly changed the magnetic properties and the magnetic interactions in the Mn sublattice cross over from a ferromagnetic character to an antiferromagnetic one. The results of earlier neutron diffraction, Mossbauer spectroscopy and specific heat measurements on SmMn2Ge2 are also used for interpreting the magnetization data and to give an account of the competing effects between various magnetic structures in the Mn and Sm sublattices. (c) 2004 Elsevier B.V. All rights reserved.