Elongated Co nanoparticles induced by swift heavy ion irradiations

被引：39

作者：

D'Orléans, C

Stoquert, JP

Estournès, C

Grob, JJ

Muller, D

Guille, JL

Richard-Plouet, M

Cerruti, C

Haas, F

机构：

[1] Lab PHASE, F-67034 Strasbourg, France

[2] GMI, IPCMS, F-67034 Strasbourg, France

[3] IReS, F-67034 Strasbourg, France

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2004年 / 216卷

关键词：

ion implantation; cobalt; nanoparticles; irradiation; magnetic anisotropy;

D O I：

10.1016/j.nimb.2003.11.063

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Spherical nanoparticles have been formed in SiO2 layers by 160 keV Col ion implantation. Different particle sizes have been obtained depending on implantation fluence (2 x 10(16), 5 x 10(16) and I x 10(17) Co+ cm(-2)) and substrate temperature (77, 295 and 873 K). These spherical particles have been subsequently irradiated with 200 MeV I-127 ions at fluences from 10(11) to 10(14) cm(-2) at 300 K. Modifications of magnetic properties of the irradiated samples, studied by a SQUID magnetometer at 5 and 295 K in a magnetic field applied perpendicular or parallel to the incident beams, have been related to the modifications of the particle size and shape observed by transmission electron microscopy (TEM). The results are in good agreement with calculations based on a model describing two different regimes: a spherical growth at low irradiation fluences and a prolate deformation along the beam direction for the high fluences. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：372 / 378

页数：7

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