Hyperfine Interactions in Ba0.5Sr0.5HfO3

R. E. ALONSO; C. HOROWITZ; A. LÓPEZ GARCÍA

Praga, República Checa

Congreso; European Meeting on Ferroelectricity; 1999

<!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-1610611985 1107304683 0 0 415 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0in; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; mso-bidi-font-size:10.0pt; font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:DE;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;} @page Section1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in; mso-header-margin:.5in; mso-footer-margin:.5in; mso-paper-source:0;} div.Section1 {page:Section1;} --> The temperature dependence of the hyperfine parameters in the perovskite-type compound Ba0.5Sr0.5HfO3 powder samples have been investigated for the first time by means of Perturbed Angular Correlation spectroscopy using implanted 181Ta hyperfine probes. The measurements have been performed as a function of temperature in the range from 293 K to 1275 K. In this compound, the hyperfine interactions have been established, showing a unique site with a static quadrupolar interaction for the probes. The hyperfine parameters show  clear signs of a non previously reported phase transition near 650 K. In this work the results of the measurement are discussed and compared with the behaviour of the similar compounds SrHfO3 and BaHfO3.