Effect of pressure on thermal expansion of UNiGa

F. Honda, G. Oomi, A. V. Andreev, L. Havela, K. Prokeš, V. Sechovský

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3 Citations (Scopus)


The thermal expansion of single crystalline UNiGa has been measured along the crystallographic axes (a and c) under pressures up to 1.1 GPa. The linear thermal expansion both in the paramagnetic and antiferromagnetic ranges is strongly anisotropic. The antiferromagnetic ordering is accompanied by considerable (10-4) linear spontaneous magnetostrictions (along the a-and c-axis) of different signs (-0.8 x 10-4 and 1.8 x 10-4). The mutual compensation of these two effects causes the volume effect to be rather small (∼10-5). Two of the four magnetic phase transitions in UNiGa indicated by the expansion anomalies under ambient pressure are suppressed by pressures above 0.5 GPa. Results of our experiments allow to construct a pressure-temperature (p-T) magnetic phase diagram.

Original languageEnglish
Pages (from-to)109-112
Number of pages4
JournalPhysica B: Condensed Matter
Issue number1-2
Publication statusPublished - Aug 1 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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