Magnetism in Gd–W films
| Autor: | Francisco Rouxinol, Rogério Valentim Gelamo, Lisandro Pavie Cardoso, Mário A. Bica de Moraes, Adenilson O. dos Santos, G.Z. Gadioli |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 103:093916 |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | Vapor condensation techniques are useful to prepare magnetic alloys whose components have low or even negligible equilibrium mutual solubility. In this work, one of these techniques—sputtering—was used to obtain GdxW1−x alloys whose magnetic properties were investigated as a function of the Gd atomic concentration x. Gadolinium and various Gd-based alloys are promising materials for magnetic refrigeration and this was one of the motivations for this study. The Gdx–W1−x films were sputter deposited from Gd and W targets with x ranging from 0 to 1 as determined by x-ray energy-dispersive spectroscopic analyses. X-ray diffraction patterns indicate that crystalline structures were formed at low and high Gd concentrations, while at intermediate concentrations, the films were amorphous. Magnetization measurements, performed as a function of temperature and with static and alternating applied fields, reveal a spin glasslike behavior in all the W-containing samples for temperatures below the freezing temperature ... |
| Databáze: | OpenAIRE |
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