|
|||||
|
|
Microstructure and magnetism in barium strontium titanate (BSTO)-barium hexaferrite (BaM) multilayers |
|
| Authors: | NA Frey S Srinath NJ Dudney |
| Affiliation: | a Materials Physics Laboratory, Physics Department, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, USA b Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA |
| Abstract: | High quality multilayers of barium ferrite (BaM) and barium strontium titanate (BSTO) were grown in optimized conditions on thermally oxidized Si(1 0 0) and Al2O3 substrates using magnetron sputtering. As-grown films were amorphous and different annealing procedures were explored to stabilize crystalline phases. BSTO and BaM phases were identified using X-ray diffraction and cross-sectional scanning electron micrographs showed sharp interfaces between BSTO and BaM layers. Magnetic hysteresis loops obtained at various temperatures and field orientations showed a large coercivity (∼2500 Oe) consistent with the hard magnetic hexaferrite component. Hysteresis loops also revealed the distinct influence of magnetocrystalline and shape anisotropies at different temperature ranges. |
| Keywords: | A Multilayers A Magnetic materials B Sputtering D Magnetic properties D Microstructure |
| 本文献已被 ScienceDirect 等数据库收录！ | |