Lee, Jung-Hyuk and Lee, Daesu and Noh, Tae Won and Murugavel, Pattukkannu and Kim, Jae Wook and Kim, Kee Hoon and Jo, Younghun and Jung, Myung-Hwa and Yoon, Jong-Gul and Chung, Jin-Seok (2007) Focus Section: Formation of hexagonal phase of TbMnO3 thin film and its multiferroic properties. JOURNAL OF MATERIALS RESEARCH, 22 (8). pp. 2156-2162. ISSN 0884-2914
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TbMnO3 exists in an orthorhombic phase in nature. Recently, we successfully grew TbMnO3 thin films in the hexagonal phase using epitaxial stabilization techniques. In this article, we will show the details of the deposition conditions that allow us to fabricate the hexagonal TbMnO3 films on Pt–Al2O3(0001) substrates. The artificial hexagonal phase can be easily formed above 850 °C, irrespective of the oxygen partial pressure. The hexagonal TbMnO3 films showed ferroelectric properties, which are significantly enhanced compared to those of the orthorhombic TbMnO3 bulk phase. We find interesting anomalies in the magnetic and magnetodielectric properties of the TbMnO3 films at around 45 K, which should be related with the Mn3+ spin reorientation. We also find spin-glass-like behaviors in the magnetic susceptibility, which could be attributed to the geometric frustration of antiferromagnetically coupled Mn spins with an edge-sharing triangular lattice. This work shows details of the growth and properties of hexagonal TbMnO3 films.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||11 Aug 2009 07:13|
|Last Modified:||11 Aug 2009 07:13|
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