Amorphous silica nanoparticles embedded in epitaxial SrTiO3 and CoFe2O4 matrices

被引：17

作者：

Luo, Hongmei ^{[1
]}

Lin, Yuan ^{[1
]}

Wang, Haiyan ^{[2
]}

Baily, Scott A. ^{[1
]}

Lee, Joon Hwan ^{[2
]}

Hawley, Marilyn E. ^{[1
]}

McCleskey, T. Mark ^{[1
]}

Burrell, Anthony K. ^{[1
]}

Bauer, Eve ^{[1
]}

Civale, Leonardo ^{[1
]}

Jia, Quanxi X. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2008年 / 47卷 / 31期

关键词：

magnetic properties; materials science; nanocomposites; silica; thin films;

D O I：

10.1002/anie.200801064

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

(Figure Presented) Film formation: Polymer-assisted deposition allows the growth of nanocomposite thin films comprising amorphous silica nanoparticles embedded in epitaxial SrTiO3 and CoFe2O4 matrices (see picture). These silica nanoparticles can be as small as 10 nm and become larger with increasing post annealing temperature. The incorporation of silica into epitaxial CoFe2O4 films greatly enhances its coercivity and magnetic anisotropy. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.

引用

收藏

页码：5768 / 5771

页数：4

相关论文

共 25 条

[1] Low-dislocation-density GaN from a single growth on a textured substrate [J].

Ashby, CIH ;

Mitchell, CC ;

Han, J ;

Missert, NA ;

Provencio, PP ;

Follstaedt, DM ;

Peake, GM ;

Griego, L .

APPLIED PHYSICS LETTERS, 2000, 77 (20) :3233-3235

[2] Stabilization of higher-κ tetragonal HfO2 by SiO2 admixture enabling thermally stable metal-insulator-metal capacitors [J].

Boescke, T. S. ;

Govindarajan, S. ;

Kirsch, P. D. ;

Hung, P. Y. ;

Krug, C. ;

Lee, B. H. ;

Heitmann, J. ;

Schroeder, U. ;

Pant, G. ;

Gnade, B. E. ;

Krautschneider, W. H. .

APPLIED PHYSICS LETTERS, 2007, 91 (07)

[3] Polymer assisted deposition [J].

Burrell, Anthony K. ;

McCleskey, T. Mark ;

Jia, Q. X. .

CHEMICAL COMMUNICATIONS, 2008, (11) :1271-1277

[4] Synthesis and characterization of CoFe2O4 nanoparticles dispersed in a silica matrix by a sol-gel autocombustion method [J].

Cannas, C. ;

Musinu, A. ;

Peddis, D. ;

Piccaluga, G. .

CHEMISTRY OF MATERIALS, 2006, 18 (16) :3835-3842

[5] Gas sensing properties of nanocrystalline NiO and Co3O4 in porous silica sol-gel films [J].

Cantalini, C ;

Post, M ;

Buso, D ;

Guglielmi, A ;

Martucci, A .

SENSORS AND ACTUATORS B-CHEMICAL, 2005, 108 (1-2) :184-192

[6] Magnetic and structural investigation of highly porous CoFe2O4-SiO2 nanocomposite aerogels [J].

Casu, Alberto ;

Casula, Maria F. ;

Corrias, Anna ;

Falqui, Andrea ;

Loche, Danilo ;

Marras, Sergio .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (02) :916-922

[7] Dielectric and electrical properties of SrTiO(3+/-y)-(SiO2)x thin films [J].

Chou, HY ;

Chen, TM ;

Tseng, TY .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2005, 38 (14) :2446-2451

[8] High coercivity in SiO2-doped CoFe2O4 powders and thin films [J].

Ding, J ;

Chen, YJ ;

Shi, Y ;

Wang, S .

APPLIED PHYSICS LETTERS, 2000, 77 (22) :3621-3623

[9] SiO2 modified Co-ferrite with high coercivity [J].

Ding, J ;

Gong, H ;

Melaka, R ;

Wang, S ;

Shi, Y ;

Chen, YJ ;

Phuc, NX .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2001, 226 :1382-1384

[10] Sol-gel preparation and characterization of CoFe2O4-SiO2 nanocomposites [J].

Huang, XH ;

Chen, ZH .

SOLID STATE COMMUNICATIONS, 2004, 132 (12) :845-850