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Magnetic and electronic properties of nanocrystalline Gd3Fe5O12 garnet |
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| Authors: | H Lassri S Prasad |
| Institution: | a LPMMAT, Université Hassan II-Ain Chock, Faculté des Sciences, B.P. 5366, Mâarif, Casablanca, Morocco b Institut Néel, CNRS et Université Joseph Fourier, BP 166, F-38042, Grenoble cedex 9, France c Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India d Groupe d'étude de la Matière Condensée, CNRS/Université de Versailles-St-Quentin, 45, avenue des Etats-Unis, 78035 Versailles Cedex, France |
| Abstract: | The Gd3Fe5O12 nanocrystalline Gadolinium Iron Garnet (GdIG) obtained from a sintered block was milled in a high energy ball mill. We measured the magnetization at 5 K under applied fields up to 12 T. We report here our study of approach to saturation magnetization. The results have been interpreted within the framework of random anisotropy model. From an analysis of the approach to saturation magnetization some fundamental parameters have been extracted. We have determined the anisotropy field Hr and the local magnetic anisotropy constant KL. In addition, first-principles spin-density functional calculations, using the Full potential Linear Augmented Plane Waves (FLAPW) method are performed to investigate electronic and magnetic structures. All computed parameters are discussed and compared to available experimental data. |
| Keywords: | Nanocrystalline garnet Magnetization Local random anisotropy DOS Moment magnetic Spin density |
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