Structure and magnetic properties of 300-nm-thick FePt films with Hf underlayer |
| |
| Institution: | 1. Department of Electrical Engineering, Hsiuping University of Science and Technology, Taichung 412, Taiwan;2. Department of Applied Physics, Tunghai University, Taichung 407, Taiwan;3. iSentek Ltd., Advanced Sensor Laboratory, New Taipei City 221, Taiwan;4. Department of Physics, National Chung Cheng University, Chia-Yi 621, Taiwan;1. Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;2. Department of Mechanical and Materials Engineeering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;3. Department of Physics, University of Pune, Pune 411007, Maharashtra, India;1. College of Chemical Engineering, Zhejiang University of Technology, No. 18, Chaowang Road, Hangzhou 310014, People''s Republic of China;2. School of Electronic Engineering, Dongguan University of Technology, Guangdong 523808, People''s Republic of China;3. College of Chemistry and Chemical Engineering, Shaoxing University, Zhejiang 312000, People''s Republic of China;4. Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, People''s Republic of China;5. NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;1. Department of Chemistry, Physical Chemistry Section, Visva Bharati University, Santiniketan, Birbhum 731235, West Bengal, India;2. Department of Chemistry, Bishnupur Ramananda College, Bishnupur, Bankura 722122, West Bengal, India;3. Department of Chemistry, Brahmankhanda Basapara High School, Basapara, Birbhum 731215, West Bengal, India;1. Department of Applied Physics, Tunghai University, Taichung 407, Taiwan;2. Department of Electrical Engineering, Hsiuping University of Science and Technology, Taichung 412, Taiwan;3. iSentek Ltd., Advanced Sensor Laboratory, Taipei 221, Taiwan;4. Department of Physics, Fu Jen Catholic University, Taipei 242, Taiwan;5. Institute of Physics, Academia Sinica, Taipei 115, Taiwan;1. Systems and Applied Mechanics Laboratory LASMAP, Polytechnic School of Tunisia, Rue El Kawarezmi La Marsa 743, Tunis, Tunisia;2. CRISMAT/CNRS, UCBN/ENSICAEN, 6 Bd Maréchal Juin, 14050 Caen, France |
| |
| Abstract: | Structure, microstructure, magnetic properties of 300-nm-thick FePt films with 10-nm-thick Hf underlayer have been studied. The experimental results showed that the very thin Hf underlayer could promote the ordering at reduced temperatures by facilitating the nucleation of the order phase, leading to refined grain size and magnetic domain size. Therefore, the permanent magnetic properties of FePt films were enhanced. (BH)max and Hc of FePt films were greatly enhanced from 5.0–21.0 MGOe and 1.4–11.0 kOe for single layer to 10.2–23.6 MGOe and 4.5–13.2 kOe for Hf-underlayered films annealed in Ta region of 400–600 °C, respectively. Nevertheless, the severe interdiffusion between the Hf and FePt layers at Ta=800 °C resulted in the decreased S, coarsened surface morphology, grain and magnetic domain sizes, and therefore the slightly decreased (BH)max to 18.0 MGOe. |
| |
| Keywords: | FePt Energy product Magnetic thick films Hf underlayer |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
