IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Magnetism in powder and film doped oxide dilute magnettic semiconductors. Facts and questions.
Autor/es:
F.H. SÁNCHEZ
Lugar:
Buenos Aires
Reunión:
Simposio; International Symposium on Metastable, Amorphous and Nanostructured Materials; 2008
Institución organizadora:
UBA-CONICET-CIDIDI
Resumen:
<!-- /* Font Definitions */ @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-1610611985 1073750139 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin-top:0cm; margin-right:0cm; margin-bottom:10.0pt; margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:Calibri; mso-fareast-font-family:Calibri; mso-bidi-font-family:"Times New Roman"; mso-ansi-language:ES-AR; mso-fareast-language:EN-US;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> A variety of doped-semiconducting materials, called diluted magnetic semiconductors (DMS) combine two properties: semiconductivity and ferromagnetism. DMS that retain their magnetism at and above RT are critically important in the development of spintronics as spin injectors for heterostructures that can operate without cryogenic cooling. Diluted magnetic semiconducting oxides (O-DMS) are among the most promising materials of this kind and have posed interesting new problems in magnetism. We present results on DM-SnO2 (a wide band gap transparent semiconductor) prepared in the form of powders and films by mechanosynthesis and laser ablation deposition. The magnetic structure of Fe-doped powders is analyzed, and the reliability on reported  magnetism in pure SnO2 films is discussed.
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