Temperature defendence of the hyperfine interaction in (NH4)2ZrF6

The thermal evolution of the hyperfine quadrupole interaction in (NH4)2ZrF6 has been investigated via TDPAC from 14 to 400 K. A phase transition is detected near 370 K. The low-temperature phase exhibits two sites equally populated for181Ta probes. The associated electric field gradients are describ...

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Bibliographic Details
Authors: Rodríguez, Agustín Mario, Martínez, Jorge Alberto, Caracoche, María Cristina, Rivas, Patricia Claudia, López García, Alberto Raúl
Format: article
Status:Published version
Publication Date:1983
Country:Argentina
Institution:Universidad Nacional de La Plata
Repository:SEDICI (UNLP)
Language:English
OAI Identifier:oai:sedici.unlp.edu.ar:10915/138589
Online Access:http://sedici.unlp.edu.ar/handle/10915/138589
Access Level:Open access
Keyword:Ciencias Exactas
hyperfine quadrupole interaction
TDPAC measurements
temperatura
Description
Summary:The thermal evolution of the hyperfine quadrupole interaction in (NH4)2ZrF6 has been investigated via TDPAC from 14 to 400 K. A phase transition is detected near 370 K. The low-temperature phase exhibits two sites equally populated for181Ta probes. The associated electric field gradients are described by both high asymmetry parameters and high interaction frequencies. On the other hand, the high-temperature phase corresponds to an unique axially symmetric and more intense electric field gradient.

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