| Full text | |
| Author(s): |
Cabrera-Baez, M.
[1]
;
Iwamoto, W.
[2, 3]
;
Magnavita, E. T.
[1]
;
Osorio-Guillen, J. M.
[4]
;
Ribeiro, R. A.
[1]
;
Avila, M. A.
[1]
;
Rettori, C.
[2, 1]
Total Authors: 7
|
| Affiliation: | [1] Univ Fed ABC UFABC, CCNH, BR-09210580 Santo Andre, SP - Brazil
[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[3] Univ Fed Uberlandia, Inst Fis, BR-38400902 Uberlandia, MG - Brazil
[4] Univ Antioquia UdeA, Inst Fis, Medellin - Colombia
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | JOURNAL OF PHYSICS-CONDENSED MATTER; v. 26, n. 17 APR 30 2014. |
| Web of Science Citations: | 8 |
| Abstract | |
Interest in the electronic structure of the intermetallic compound YIn3 has been renewed with the recent discovery of superconductivity at T similar to 1 K, which may be filamentary in nature. In this work we perform electron spin resonance (ESR) experiments on Gd3+ doped YIn3 (Y1-xGdxIn3; 0.001 less than or similar to x <= 0.08), showing that the spin-lattice relaxation of the Gd3+ ions, due to the exchange interaction between the Gd3+ localized magnetic moment and the conduction electrons (ce), is processed via the presence of s-, p- and d-type ce at the YIn3 Fermi level. These findings are revealed by the Gd3+ concentration dependence of the Korringa-like relaxation rate d(Delta H)/dT and g-shift (Delta g = g - 1.993), that display bottleneck relaxation behavior for the s- electrons and unbottleneck behavior for the p- and d-electrons. The Korringa- like relaxation rates vary from 22(2) Oe/K for x. 0.001 to 8(2) Oe/K for x = 0.08 and the g- shift values change, respectively, from a positive.g = + 0.047(10) to a negative Delta g = - 0.008( 4). Analysis in terms of a three-band ce model allows the extraction of the corresponding exchange interaction parameters J(fs), J(fp) and J(fd). (AU) | |
| FAPESP's process: | 12/17562-9 - Preparation of oriented single crystals for studies on electronic, magnetic and thermal anisotropies |
| Grantee: | Marcos de Abreu Avila |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 11/19924-2 - Study and development of advanced novel materials: electronic, magnetic and nanostructured: an interdisciplinary approach |
| Grantee: | Carlos Rettori |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 12/05903-6 - Nuclear magnetic resonance of novel complex and advanced materials in condensed matter physics |
| Grantee: | Ricardo Rodrigues Urbano |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 11/01564-0 - Materials sciences on complex and advanced systems |
| Grantee: | Pascoal Jose Giglio Pagliuso |
| Support Opportunities: | Scholarships abroad - Research |