Effects of strain, defects and crystal phase transition in mechanically milled nanocrystalline In2O3 powder

Autor(es)

Carvalho, M. H. ^[1] ; Rizzo Piton, M. ^[1] ; Lemine, O. M. ^[2] ; Bououdina, M. ^[3] ; Galeti, H. V. A. ^[4] ; Souto, S. ^[5] ; Pereira, E. C. ^[6] ; Galvao Gobato, Y. ^[1] ; de Oliveira, A. J. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos UFSCar, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil

^[2] Al Imam Mohammad Ibn Saud Islamic Univ IMISU, Coll Sci, Phys Dept, POB 90950, Riyadh 11623 - Saudi Arabia

^[3] Bahrain Univ, Phys Dept, Zallaq - Bahrain

^[4] Univ Fed Sao Carlos, Dept Engn Eletr, BR-13565905 Sao Carlos, SP - Brazil

^[5] Univ Sao Paulo, Fac Zootecnia & Engn Alimentos, Dept Ciencias Basicas, BR-13635900 Pirassununga, SP - Brazil

^[6] Univ Fed Sao Carlos UFSCar, Dept Quim, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH EXPRESS; v. 6, n. 2 FEB 2019.
• Citações Web of Science: 2

Resumo

In this paper, we investigated structural, optical and magnetic properties of mechanically milled In2O3 nanoparticles in the cubic bixbyite phase. It was observed that mechanical milling induces an important increase in the density of defects, strain and hexagonal phase transition for cubic In2O3 nanoparticles. Remarkably, room temperature ferromagnetism was observed after mechanical milling. The hexagonal phase of In2O3 nanoparticles (H-In2O3) which is usually obtained in a high-temperature and pressure environment was clearly observed for the sample submitted to higher milling times which considerably affects the magnetic and optical properties. The physical origin of the FM order of mechanically milled In2O3 nanoparticles has been ascribed to the increase in the density of defects and strain. (AU)

• Processo FAPESP: 09/54082-2 - EMU: projeto para aquisição de um magnetômetro de amostra vibrante que utiliza como sensor um dispositivo supercondutor de interferência quântica acoplado (Squid-VSM) com circuito fechado de criogenia
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