Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electron spin resonance (ESR) of Eu2+ in type-I clathrate Eu8Ga16Ge30

Full text
Author(s):
Holanda, L. M. [1] ; Vargas, J. M. [1] ; Rettori, C. [1] ; Pagliuso, P. G. [1] ; Bittar, E. M. [1] ; Avila, M. A. [2] ; Takabatake, T. [2]
Total Authors: 7
Affiliation:
[1] Univ Estadual Campinas, Dept Eletron Quant, Inst Fis Gleb Wataghin, Campinas, SP - Brazil
[2] Hiroshima Univ, AdSM, Dept Quantum Matter, Higashihiroshima 7398530 - Japan
Total Affiliations: 2
Document type: Journal article
Source: PHYSICA B-CONDENSED MATTER; v. 404, n. 19, p. 3300-3303, OCT 15 2009.
Web of Science Citations: 6
Abstract

We report temperature dependent X-band (nu similar to 9.5 GHz) electron spin resonance (ESR) experiments in type-I clathrate Eu(8)Ga(16)Ge(30). This system presents interesting thermoelectric properties in its paramagnetic state and orders ferromagnetically below T(C) = 35 K Although the Eu(2+) ions sits on two inequivalent sites in the type-I clathrate structure, we found in the paramagnetic state a single Dysonian Eu(2+) ESR line with a nearly temperature independent g similar to 2 is observed, and its linewidth follows a Korringa-like behavior as a function of temperature. The microscopic details of the exchange coupling between the Eu(2+) local moments and the conduction-electrons (c-e) in this compound are investigated through the obtained Korringa rate (Delta H/Delta T similar to 1 (1) Oe/K) and g-shift (Delta g similar to 0.01(1)) from ESR experiments combined with the magnetic susceptibility and specific heat data. (c) 2009 Elsevier B.V. All rights reserved. (AU)