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Variation of the magnetic ordering in GdT2Zn20 (T=Fe, Ru, Os, Co, Rh and Ir) and its correlation with the electronic structure of isostructural YT2Zn20
Physical Review B
  • Shuang Jia, Iowa State University
  • Ni Ni, Iowa State University
  • G. D. Samolyuk, Iowa State University
  • A. Safa-Sefat, Iowa State University
  • K. Dennis, Iowa State University
  • Hyunjin Ko, Iowa State University
  • Gordon J. Miller, Iowa State University
  • Sergey L. Bud'ko, Iowa State University
  • Paul C. Canfield, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-2008
DOI
10.1103/PhysRevB.77.104408
Abstract

Magnetization, resistivity, and specific heat measurements were performed on solution-grown single crystals of six GdT2Zn20 (T=Fe, Ru, Os, Co, Rh, and Ir) compounds, as well as on their Y analogs. For the Gd compounds, the Fe column members manifest a ferromagnetic (FM) ground state (with an enhanced Curie temperature TC for T=Fe and Ru), whereas the Co column members manifest an antiferromagnetic (AFM) ground state. Thermodynamic measurements on YT2Zn20 revealed that the enhanced TC for GdFe2Zn20 and GdRu2Zn20 can be understood within the framework of Heisenberg moments embedded in a nearly ferromagnetic Fermi liquid. Furthermore, electronic structure calculations indicate that this significant enhancement is due to a large transition metal partial density of states at the Fermi level that places these compounds close to the Stoner FM criterion. The change from FM to AFM ordering (between the Fe and Co column materials) is associated with the filling of electronic states with two additional electrons/f.u. The degree of this sensitivity is addressed by the studies of the pseudoternary compounds Gd(FexCo1−x)2Zn20 and Y(FexCo1−x)2Zn20, which clearly reveal the effect of 3d-band filling on their magnetic properties.

Comments

This article is from Physcial Review B 77 (2008): 1, doi:10.1103/PhysRevB.77.104408. Posted with permission.

Copyright Owner
American Physical Society
Language
en
File Format
application/pdf
Citation Information
Shuang Jia, Ni Ni, G. D. Samolyuk, A. Safa-Sefat, et al.. "Variation of the magnetic ordering in GdT2Zn20 (T=Fe, Ru, Os, Co, Rh and Ir) and its correlation with the electronic structure of isostructural YT2Zn20" Physical Review B Vol. 77 Iss. 104408 (2008) p. 1 - 14
Available at: http://works.bepress.com/gordon-miller/115/