Actas de congresos
Structural, Magnetic And Transport Properties Of Discontinuous Granular Multi-layers
Registro en:
Journal Of Magnetism And Magnetic Materials. , v. 294, n. 2, p. 206 - 212, 2005.
3048853
10.1016/j.jmmm.2005.03.036
2-s2.0-20344377998
Autor
Denardin J.C.
Knobel M.
Dorneles L.S.
Schelp L.F.
Institución
Resumen
Results of structural, magnetic and transport properties of magnetic Co/SiO2 discontinuous multi-layers produced by sequential deposition are presented. Transmission electron microscopy (TEM) images show that the samples that are close to metal-insulation transition are composed by a connected network of metallic paths, and display an enhanced Hall Effect. The granular samples are composed by an almost periodic array of Co nanoparticles, and after annealing these samples show a clear evolution in the nanostructure, with increasing average Co grain sizes and decreasing size dispersion. Relationships between the nanostructure and magnetotransport properties are discussed and compared with previous results obtained in cosputtered films. © 2005 Elsevier B.V. All rights reserved. 294 2 206 212 Abeles, B., Sheng, P., Coutts, M.D., Arie, Y., (1975) Adv. Phys., 24, p. 40 Vázquez, M., Hernando, A., (1995) Adv. Mater., 7, p. 1021 Herzer, G., (1993) Phys. Scripta T, 49, p. 307 Hernando, A., Kulik, T., (1994) Phys. Rev. B, 49, p. 7064 Denardin, J.C., Brandl, A.L., Knobel, M., Panissod, P., Pakhomov, A.B., Liu, H., Zhang, X.X., (2002) Phys. Rev. B, 65, p. 064422 Milner, A., Gerber, A., Groisman, B., Karpovsky, M., Gladkikh, A., (1996) Phys. Rev. Lett., 76, p. 475 Slawska-Waniewska, A., Gutowski, M., Lachowicz, H.K., Kulik, T., Matyja, H., (1992) Phys. Rev. B, 46, p. 14594 Pakhomov, A.B., Yan, X., Zhao, B., (1995) Appl. Phys. Lett., 67, p. 3497 Jing, X.N., Wang, N., Pakhomov, A.B., Fung, K.K., Yan, X., (1996) Phys. Rev. B, 53, p. 14032 Denardin, J.C., Knobel, M., Pakhomov, A.B., Zhang, X.X., (2003) J. Magn. Magn. Mater., 262, p. 15 Aronzon, B.A., Rylkov, V.V., Kovalev, D.Y., Meilikhov, E.Z., Ryl'Kov, V.V., Sedova, M.V., (2000) Phys. Stat. Solidi, 218, p. 169 Aronzon, B.A., Granovskii, A.B., Kovalev, D.Y., Meilikhov, E.Z., Ryl'Kov, V.V., Sedova, M.V., (2000) JETP Lett., 71, p. 469 Zhang, X.X., Wan, C.C., Liu, H., Li, Z.Q., Sheng, P., Lin, J.J., (2001) Phys. Rev. Lett., 86, p. 5562 Wan, C.C., Sheng, P., (2002) Phys. Rev. B, 66, p. 075309 Maurice, J.L., Briatico, J., Carrey, J., Petroff, F., Schelp, L.F., Vaures, A., (1999) Philos. Mag. A, 79, p. 2921 Skumryev, V., Stoyanov, S., Zhang, Y., Hadjipanayis, G., Givord, D., Nogues, J., (2003) Nature, 423, p. 850 L.M. Socolovsky, C.L.P. Oliveira, J.C. Denardin, M. Knobel, I.L. Torriani, unpublishedDa Silva, F.C.S., Ferrari, E.F., Knobel, M., (1998) J. Appl. Phys., 84, p. 5366 Denardin, J.C., Knobel, M., Socolovsky, L.M., Brandl, A.L., Zhang, X.X., (2003) IEEE Trans. Magn., 39, p. 2767