Interacciones cuadripolares en SrZrO<SUB>3</SUB>
The SrMO3 compounds with M = Ru, Zr ó Hf display similar structures. They are orthorhombic at room temperature (RT) and transform into tetragonal (14/mcm) and cubic (Pm3m) at higher temperatures. These structures are characterized by rotations of the quasi-rigid oxygen octahedron through different a...
| Autores principales: | , |
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| Formato: | Articulo |
| Lenguaje: | Spanish / Castilian |
| Publicado: |
2004
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/34631 |
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| _version_ | 1862014487217831936 |
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| author | López García, Alberto Raúl Alonso, Roberto Emilio |
| author_facet | López García, Alberto Raúl Alonso, Roberto Emilio |
| author_sort | López García, Alberto Raúl |
| collection | Repositorio Sedici - Comunidad |
| description | The SrMO3 compounds with M = Ru, Zr ó Hf display similar structures. They are orthorhombic at room temperature (RT) and transform into tetragonal (14/mcm) and cubic (Pm3m) at higher temperatures. These structures are characterized by rotations of the quasi-rigid oxygen octahedron through different axes. As temperature increases the rotation axes changes at the transition temperature but the M-O distances remain almost constant (1%) in the whole temperature range. The crystallographic study of the tetragonal to cubic transformation shows that it occurs by the rotation ø(T <SUB>C</SUB>)→0 of the rigid oxygen octahedron about the c axis. This transition is of second order and can be described by ø(T) ∼ ø0 (T<SUB>C</SUB>-T)<SUP>β</SUP>. β is the critical exponent and was fitted to 1/2, 1/4 and 1/8 for M = Hf, Zr and Ru, respectively. The electronic structure of these compounds should follows such changes and can be studied through the measurement of the quadrupole interaction as a function of temperature. In this contribution these results obtained by Perturbed Angular Correlations spectroscopy (PAC) for SrZrO<SUB>3</SUB> are discussed. |
| format | Articulo |
| id | I89-R6-10915-34631 |
| institution | UNLP - Facultad de Arquitectura y Urbanismo |
| institution_str | I-89 |
| language | Spanish / Castilian |
| publishDate | 2004 |
| record_format | dspace |
| repository_str | R-6 |
| spelling | I89-R6-10915-346312026-02-24T16:47:53Z http://sedici.unlp.edu.ar/handle/10915/34631 Interacciones cuadripolares en SrZrO<SUB>3</SUB> Quadrupole interactions in SrZrO<SUB>3</SUB> López García, Alberto Raúl Alonso, Roberto Emilio 2004 2014-04-11T21:13:16Z es Ciencias Exactas Física defects hyperfine interaction perovskites phase transitions The SrMO3 compounds with M = Ru, Zr ó Hf display similar structures. They are orthorhombic at room temperature (RT) and transform into tetragonal (14/mcm) and cubic (Pm3m) at higher temperatures. These structures are characterized by rotations of the quasi-rigid oxygen octahedron through different axes. As temperature increases the rotation axes changes at the transition temperature but the M-O distances remain almost constant (1%) in the whole temperature range. The crystallographic study of the tetragonal to cubic transformation shows that it occurs by the rotation ø(T <SUB>C</SUB>)→0 of the rigid oxygen octahedron about the c axis. This transition is of second order and can be described by ø(T) ∼ ø0 (T<SUB>C</SUB>-T)<SUP>β</SUP>. β is the critical exponent and was fitted to 1/2, 1/4 and 1/8 for M = Hf, Zr and Ru, respectively. The electronic structure of these compounds should follows such changes and can be studied through the measurement of the quadrupole interaction as a function of temperature. In this contribution these results obtained by Perturbed Angular Correlations spectroscopy (PAC) for SrZrO<SUB>3</SUB> are discussed. Facultad de Ciencias Exactas Articulo Articulo http://creativecommons.org/licenses/by-nc/3.0/ Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0) application/pdf 695-697 |
| spellingShingle | Ciencias Exactas Física defects hyperfine interaction perovskites phase transitions López García, Alberto Raúl Alonso, Roberto Emilio Interacciones cuadripolares en SrZrO<SUB>3</SUB> |
| title | Interacciones cuadripolares en SrZrO<SUB>3</SUB> |
| title_full | Interacciones cuadripolares en SrZrO<SUB>3</SUB> |
| title_fullStr | Interacciones cuadripolares en SrZrO<SUB>3</SUB> |
| title_full_unstemmed | Interacciones cuadripolares en SrZrO<SUB>3</SUB> |
| title_short | Interacciones cuadripolares en SrZrO<SUB>3</SUB> |
| title_sort | interacciones cuadripolares en srzro sub 3 sub |
| topic | Ciencias Exactas Física defects hyperfine interaction perovskites phase transitions |
| url | http://sedici.unlp.edu.ar/handle/10915/34631 |
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