The effect of pressure and temperature on the electric field gradient at <sup>111</sup>Cd on In sites in intermetallic In-Bi
S G Fries; A Maciel; J A H da Jornada; S G Fries; Inst. de Fisica, Univ. Federal do Rio Grande do Sul, Port Alegre, Brazil; A Maciel; Inst. de Fisica, Univ. Federal do Rio Grande do Sul, Port Alegre, Brazil; J A H da Jornada; Inst. de Fisica, Univ. Federal do Rio Grande do Sul, Port Alegre, Brazil
Журнал:
Journal of Physics F: Metal Physics
Дата:
1988-04-01
Аннотация:
The time-dependent perturbed angular correlation (TDPAC) technique was used to measure the electric field gradient (EFG) as a function of pressure for the compounds InBi, In<sub>2</sub>Bi and In<sub>5</sub>Bi<sub>3</sub> and as a function of temperature for In<sub>5</sub>Bi<sub>3</sub> <sup>111</sup>Cd as probe on the indium sites. It was possible to identify the phase transition induced by pressure in the compound In<sub>2</sub>Bi as a transformation to the structure of the compound In<sub>5</sub>Bi<sub>3</sub> with defects. Estimates were made of the volume and the explicit temperature dependences of the EFG for the compounds In<sub>2</sub>Bi and In<sub>5</sub>Bi<sub>3</sub>. The high values of the volume dependence of the EFG obtained for In<sub>2</sub>Bi is comparable to the known values for pure metals. The importance of anharmonic effects in the EFG shows up for In<sub>5</sub>Bi<sub>3</sub>.
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