155Gd Mössbauer effect and magnetic properties of novel RT2B2C compounds with TNi, Co

F. M. Mulder, J.H.V.J. Brabers, R. Coehoorn, R. C. Thiel, K.H.J. Buschow, F. R. de Boer

Research output: Contribution to journalArticleAcademicpeer-review

35 Citations (Scopus)

Abstract

We have prepared the compounds GdNi2B2C and GdCo2B2C and investigated their magnetic properties by means of 155Gd Mössbauer spectroscopy. From the temperature dependence of the hyperfine field, we derived that these two compounds give rise to magnetic ordering at 5.5±0.5 K and 21±1 K respectively. Large values of the electric field gradient Vzz were found, reminiscent of compounds of the related ThCr2Si2 type. A quantitative explanation of the origin of these field gradients is presented by ab initio band structure calculations. The experimental values of Vzz have been used to estimate values for the second-order crystal field parameter in GdNi2B2C (A2 0=-428Ka0 -2) and GdCo2B2C (A2 0=-346Ka0 -2).

Original languageEnglish
Pages (from-to)118-122
Number of pages5
JournalJournal of Alloys and Compounds
Volume217
Issue number1
DOIs
Publication statusPublished - 15 Jan 1995
Externally publishedYes

Keywords

  • Band structure calculations
  • Crystal field
  • Electric field gradient
  • Magnetic properties
  • Mössbauer effect

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