Ion-beam induced fcc-bcc transition in ultrathin Fe films for ferromagnetic patterning

被引：17
作者：
Rupp, W. [1 ,2 ]
Biedermann, A. [3 ]
Kamenik, B. [1 ]
Ritter, R. [1 ]
Klein, Ch. [2 ]
Platzgummer, E. [2 ]
Schmid, M. [1 ]
Varga, P. [1 ]
机构：
[1] Vienna Univ Technol, Inst Allgemeine Phys, A-1040 Vienna, Austria
[2] IMS Nanofabricat AG, A-1020 Vienna, Austria
[3] Univ Vienna, Fac Phys, A-1090 Vienna, Austria
来源：
APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 06期
关键词：
D O I：
10.1063/1.2969795
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Ar+ ion irradiation is used to induce a structural change from fcc to bcc in a 1.5 nm thick Fe film epitaxially grown on a Cu(100) crystal. Scanning tunneling microscopy and low-energy electron diffraction show the nucleation of bcc nanocrystals, which grow with increasing ion dose. As a consequence of the structural change, the irradiated iron film becomes strongly ferromagnetic at room temperature. We present a model for the process of the transformation and demonstrate writing a magnetic pattern at the 100 nm scale by ion-beam projection lithography. (C) 2008 American Institute of Physics.
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