resumo
We report a study on the pressure response of the anisotropy energy of hollow and solid maghemite nanoparticles. The differences between the maghemite samples are understood in terms of size, magnetic anisotropy and shape of the particles. In particular, the differences between hollow and solid samples are due to the different shape of the nanoparticles and by comparing both pressure responses it is possible to conclude that the shell has a larger pressure response when compared to the core. (c) 2013 Elsevier B.V. All rights reserved.
palavras-chave
GAMMA-FE2O3 NANOPARTICLES; TRANSITION
categoria
Materials Science; Physics
autores
Silva, NJO; Saisho, S; Mito, M; Millan, A; Palacio, F; Cabot, A; Iglesias, O; Labarta, A
nossos autores
Nuno João Silva
Investigador Principalagradecimentos
The Aveiro-Barcelona collaboration has been supported by the Integrated Spanish-Portuguese Action under the Grant no. AIB2010PT-00099. The Aveiro-Zaragoza collaboration has been supported by the Integrated Spanish-Portuguese Action PT2009-0131. The work in Zaragoza has been supported by the research Grants MAT2011-27233-C02-02, MAT2011-25991 and CONSOLIDER CSD2007-00010 from the Ministry of Education. The financial support of the CSIC and Spanish Ministerio de Ciencia e Innovacion (PI201060E013) is also acknowledged. The work in Japan was supported by a Grant-in-Aid for Scientific Research (C) (No. 23550158) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. O.I. and A.L. acknowledge funding of the Spanish MICINN through Grant nos. MAT2009-08667 and CSD2006-00012, and Catalan DIUE through Project no. 2009SGR856. N.J.O.S. acknowledges FCT for Ciencia 2008 program.