Issue |
EPL
Volume 98, Number 3, May 2012
|
|
---|---|---|
Article Number | 37001 | |
Number of page(s) | 4 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/98/37001 | |
Published online | 08 May 2012 |
Epitaxial growth and magnetic response of La0.8Ca0.2MnO3 thin films grown on ultrathin SrTiO3 buffered GaAs substrates
Department of Physics, The University of Hong Kong - Pokfulam Road, Hong Kong
Received:
21
February
2012
Accepted:
3
April
2012
Colossal-magnetoresistance manganites La0.8Ca0.2MnO3 (LCMO) films were epitaxially grown on (001) GaAs substrates by pulsed-laser deposition. An ultrathin SrTiO3 (STO) film (∼10 nm) was used as a buffer layer to reduce the lattice mismatch and interdiffusion. The crystallinity and the growth mode were investigated using X-ray diffraction and reflective high-energy electron diffraction. The results indicate that LCMO is grown with a highly c-axis epitaxial feature depending on the STO buffer layer. The heterostructures exhibit good rectifying behavior in a wide temperature range from 50 K to 300 K with a paramagnetic-ferromagnetic transition at ∼200 K. Both the LCMO thin films and the LCMO/STO/GaAs heterojunctions showed magnetic response under the magnetic fields.
PACS: 73.21.Ac – Multilayers / 75.47.Gk – Colossal magnetoresistance
© EPLA, 2012
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