Issue |
Europhys. Lett.
Volume 64, Number 5, December 2003
|
|
---|---|---|
Page(s) | 668 - 674 | |
Section | Condensed matter: structure, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i2003-00279-7 | |
Published online | 01 November 2003 |
Xenon-ion–induced phase transition in thin
films
1
II. Physikalisches Institut and SFB 602, Universität Göttingen Tammannstr. 1, D-37077 Göttingen, Germany
2
Institute of Instrumentation, D. A. University - Khandwa Road, Indore-452017, India
3
I. Physikalisches Institut, Universität Göttingen Tammannstr. 1, D-37077 Göttingen, Germany
Received:
26
May
2003
Accepted:
30
September
2003
We report on the observation of the ion-induced hcp
fcc phase transition in 75
thick polycrystalline
films, which were irradiated with 200
ions to fluences of
–
at a temperature of 300
. Analyses by
means of Rutherford Backscattering Spectroscopy (RBS), X-Ray
Diffraction (XRD), Magneto-Optical Kerr Effect (MOKE) and
Vibrating Sample Magnetometry (VSM) provided information on the
film thickness and the implanted
profiles, the phase
structure, the ion-induced lattice expansion and the magnetic
hysteresis, respectively. After film deposition and irradiations
up to
, we predominantly found the
hcp phase (XRD, uniaxial MOKE pattern) with an in-plane
magnetization. The transition to fourfold in-plane magnetization
typical of the fcc-phase occurred around a fluence of
. We interpreted these findings as due to
rapid cooling of thermal spikes into the metastable
-fcc
phase.
PACS: 61.80.Jh – Ion radiation effects / 75.30.Gw – Magnetic anisotropy / 75.50.Cc – Other ferromagnetic metals and alloys
© EDP Sciences, 2003
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