Room-Temperature Ferromagnetism in Antiferromagnetic Cobalt Oxide Nanooctahedra

被引：82

作者：

Fontaina-Troitino, Nerio ^{[1
]}

Liebana-Vinas, Sara ^{[1
,2
,3
]}

Rodriguez-Gonzalez, Benito ^{[1
]}

Li, Zi-An ^{[2
,3
]}

Spasova, Marina ^{[2
,3
]}

Farle, Michael ^{[2
,3
]}

Salgueirino, Veronica ^{[1
]}

机构：

[1] Univ Vigo, Dept Fis Aplicada, Vigo 36310, Spain

[2] Univ Duisburg Essen, Fak Phys, D-47057 Duisburg, Germany

[3] Univ Duisburg Essen, Ctr Nanointegrat CENIDE, D-47057 Duisburg, Germany

来源：

NANO LETTERS | 2014年 / 14卷 / 02期

关键词：

Ferromagnetism; antiferromagnetism; strain; anisotropy; ELECTRON-MICROSCOPY; NANOPARTICLES; NANOCRYSTALS; FILMS;

D O I：

10.1021/nl4038533

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Cobalt oxide octahedra were synthesized by thermal decomposition. Each octahedron-shaped nanoparticle consists of an antiferromagnetic CoO core enclosed by eight {111} facets interfaced to a thin (similar to 4 nm) surface layer of strained Co3O4. The nearly perfectly octahedral shaped particles with 20, 40, and 85 nm edge length show a weak room-temperature ferromagnetism that can be attributed to ferromagnetic correlations appearing due to strained lattice configurations at the CoO/Co3O4 interface.

引用

页码：640 / 647

页数：8

共 36 条

[1] Atomic spin structure of antiferromagnetic domain walls [J].

Bode, M. ;

Vedmedenko, E. Y. ;

Von Bergmann, K. ;

Kubetzka, A. ;

Ferriani, P. ;

Heinze, S. ;

Wiesendanger, R. .

NATURE MATERIALS, 2006, 5 (06) :477-481

[2] Strain-Induced Spin States in Atomically Ordered Cobaltites [J].

Choi, Woo Seok ;

Kwon, Ji-Hwan ;

Jeen, Hyoungjeen ;

Hamann-Borrero, Jorge E. ;

Radi, Abdullah ;

Macke, Sebastian ;

Sutarto, Ronny ;

He, Feizhou ;

Sawatzky, George A. ;

Hinkov, Vladimir ;

Kim, Miyoung ;

Lee, Ho Nyung .

NANO LETTERS, 2012, 12 (09) :4966-4970

[3] Hierarchical Zinc Oxide Materials with Multiple Porosity Prepared by Ultrafast Temperature Gradient Chemical Gas-Phase Synthesis [J].

Dilger, Stefan ;

Lizandara-Pueyo, Carlos ;

Krumm, Michael ;

Polarz, Sebastian .

ADVANCED MATERIALS, 2012, 24 (04) :543-+

[4] Influence of surface diffusion on the formation of hollow nanostructures induced by the Kirkendall effect: The basic concept [J].

Fan, Hong Jin ;

Knez, Mato ;

Scholz, Roland ;

Hesse, Dietrich ;

Nielsch, Kornelius ;

Zacharias, Margit ;

Gosele, Ulrich .

NANO LETTERS, 2007, 7 (04) :993-997

[5] Monocrystalline spinel nanotube fabrication based on the Kirkendall effect [J].

Fan, Hong Jin ;

Knez, Mato ;

Scholz, Roland ;

Nielsch, Kornelius ;

Pippel, Eckhard ;

Hesse, Dietrich ;

Zacharias, Margit ;

Goesele, Ulrich .

NATURE MATERIALS, 2006, 5 (08) :627-631

[6] Surface contribution to the anisotropy of magnetic nanoparticles [J].

Garanin, DA ;

Kachkachi, H .

PHYSICAL REVIEW LETTERS, 2003, 90 (06) :4

[7] Polarity of oxide surfaces and nanostructures [J].

Goniakowski, Jacek ;

Finocchi, Fabio ;

Noguera, Claudine .

REPORTS ON PROGRESS IN PHYSICS, 2008, 71 (01)

[8] Magnetic anisotropy in single clusters -: art. no. 024401 [J].

Jamet, M ;

Wernsdorfer, W ;

Thirion, C ;

Dupuis, V ;

Mélinon, P ;

Pérez, A ;

Mailly, D .

PHYSICAL REVIEW B, 2004, 69 (02)

[9] Tuning the magnetic coupling across ultrathin antiferromagnetic films by controlling atomic-scale roughness [J].

Kuch, W ;

Chelaru, LI ;

Offi, F ;

Wang, J ;

Kotsugi, M ;

Kirschner, J .

NATURE MATERIALS, 2006, 5 (02) :128-133

[10] Shape-Controlled Synthesis of Pd Nanocrystals in Aqueous Solutions [J].

Lim, Byungkwon ;

Jiang, Mojiong ;

Tao, Jing ;

Camargo, Pedro H. C. ;

Zhu, Yimei ;

Xia, Younan .

ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (02) :189-200

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