Nano-structured Ferroelectromagnetic Superlattices by PL-MBE for Spintronics

I-4: Nano-structured Ferroelectromagnetic Superlattices by PL-MBE for Spintronics

1: Zhu Weiguang,
2: Dong Zhili,
3: Sun Changqing,
4: Sean Li and Lu Huibin
  1. Microelectronics Center, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
  2. School of Materials Engineering, Technological University, Singapore 639798
  3. School of Materials Science and Engineering, The University of New South Wales, Sydney NSW 2052, Australia
  4. Beijing Institute of Physics, the Chinese Academy of Sciences, Beijing 100080, China

Abstract
Ferroelectromagnetism, the coexistence of magnetic and electric subsystems, engenders the material with the “product” property, thus allowing an additional degree of freedom in design of sensors, actuators, transducers, storage memory, and electronic devices such as microwave filter, tunable waveguide, microwave circulator, etc. It is extremely suitable and useful for spintronics for the electrically induced spin property. However, it would hardly find the coexistence of ferroelectricity and magnetism in a natural material, but the limit of this coexistence of strong ferro/ferrimagnetism and ferroelectricity in a single-phased natural material can be overcome by the artificially-designed material-growth approach using the pulsed-laser molecular beam epitaxy technology. In Microelectronics Center, a complete set of PL-MBE system has been installed and operated and it is possibly the only such a system in the whole ASEAN countries. PL-MBE is an emerging technology and it has become a very promising method to prepare high quality, atomically smoothed epitaxial grown thin films for various electronic and optical devices, such as in this proposed ferroelectromagnetic superlattices for spintronics. Atomically smoothed oxide superlattices have been obtained in our recent works on SrTiO3, high-k oxide gate dielectric films at NTU. These excellent research results, team expertise, and advantages of PL-MBE for spintronics will be presented.