Imaging of magnetic nanodots on self-organized semiconductor substrates -: art. no. 214422

被引：10

作者：

Mulders, AM

Rodríguez, AF

Arvanitis, D

Hofer, C

Teichert, C

Niño, MA

Camarero, J

de Miguel, JJ

Miranda, R

Lyutovich, K

Kasper, E

Heun, S

Locatelli, A

机构：

[1] Uppsala Univ, Dept Phys, S-75121 Uppsala, Sweden

[2] Mt Univ Leoben, Inst Phys, A-8700 Leoben, Austria

[3] Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain

[4] Univ Autonoma Madrid, Inst Fis Mat Nicolas Cabrera, E-28049 Madrid, Spain

[5] Univ Stuttgart, Inst Halbleitertech, D-70569 Stuttgart, Germany

[6] Sincrotrone Trieste, I-34012 Trieste, TS, Italy

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.71.214422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Arrays of magnetic nanodots have been prepared by evaporation in ultrahigh vacuum onto self-organized templates consisting of nanometric pyramids of SiGe alloy previously grown on Si(001). Co was deposited by molecular beam epitaxy at grazing incidence, so that preferential deposition occurs on the island facets facing the Co flux. The films' structural and magnetic morphology has been characterized by means of mirror electron microscopy and x-ray photoemission electron microscopy with magnetic circular dichroism. The morphology of the Co deposit is dictated by the surface template. The Co dots are elongated along the direction perpendicular to deposition due to geometrical factors of the surface at grazing incidence and via steering by the surface steps, and this promotes an uniaxial magnetic anisotropy in this direction. The dots are ferromagnetic and single domain at room temperature. Macroscopic magnetic domains composed of several dots are observed. This indicates that the dipolar interaction between them is stronger than the coercivity and the exchange interaction is minimized.

引用

页数：7

共 50 条

[1] Self-organized critical neural networks -: art. no. 066118
Bornholdt, S
Röhl, T
[J]. PHYSICAL REVIEW E, 2003, 67 (06):
[2] Self-organized criticality:: Robustness of scaling exponents -: art. no. 046141
Cernák, J
[J]. PHYSICAL REVIEW E, 2002, 65 (04):
[3] Field theory of self-organized fractal etching -: art. no. 016108
Gabrielli, A
Muñoz, MA
Sapoval, B
[J]. PHYSICAL REVIEW E, 2001, 64 (01):
[4] Self-organized (In, Mn) as diluted magnetic semiconductor nanostructures on GaAs substrates
Guo, SP
Ohno, H
Shen, A
Matsukura, F
Ohno, Y
[J]. APPLIED SURFACE SCIENCE, 1998, 130 : 797 - 802
[5] Self-organized hexagonal patterns of independent magnetic nanodots
Bobek, Thomas
Mikuszeit, Nikolai
Camarero, Julio
Kyrsta, Stepan
Yang, Lin
Nino, Miguel Angel
Hofer, Christian
Gridneva, Lidia
Arvanitis, Dimitri
Miranda, Rodolfo
De Miguel, Juan Jose
Teichert, Christian
Kurz, Heinrich
[J]. ADVANCED MATERIALS, 2007, 19 (24) : 4375 - +
[6] Comment on "Do earthquakes exhibit self-organized criticality?" -: art. no. 249801
Woodard, R
Newman, DE
Sánchez, R
Carreras, BA
[J]. PHYSICAL REVIEW LETTERS, 2004, 93 (24)
[7] Laser applications of self-organized organic photonic crystals - art. no. 703103
Furumi, Seiichi
[J]. ACTIVE PHOTONIC CRYSTALS II, 2008, 7031 : 3103 - 3103
[8] Lyapunov exponents and transport in the Zhang model of self-organized criticality -: art. no. 016133
Cessac, B
Blanchard, P
Krüger, T
[J]. PHYSICAL REVIEW E, 2001, 64 (01)
[9] Self-organized nanoscale multilayer growth in hyperthermal ion deposition -: art. no. 245418
Gerhards, I
Stillrich, H
Ronning, C
Hofsäss, H
Seibt, M
[J]. PHYSICAL REVIEW B, 2004, 70 (24) : 1 - 8
[10] Spin properties of self-organized diluted magnetic Cd1-xMnxSe quantum dots -: art. no. 121309
Hundt, A
Puls, J
Henneberger, F
[J]. PHYSICAL REVIEW B, 2004, 69 (12)

← 1 2 3 4 5 →