中国物理B ›› 2018, Vol. 27 ›› Issue (7): 77503-077503.doi: 10.1088/1674-1056/27/7/077503
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Magnetic properties of L10 FePt thin film influenced byrecoverable strains stemmed from the polarization of Pb(Mg1/3Nb2/3)O3-PbTiO3 substrate
Li-Wang Liu(刘立旺), Cheng-Chao Hu(胡成超), Ye-Chuan Xu(徐野川), Hou-Bing Huang(黄厚兵), Jiang-Wei Cao(曹江伟), Linyun Liang(梁林云), Wei-Feng Rao(饶伟锋)
- 1 Department of Materials Physics, and IEMM, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2 College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China;
3 Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
4 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
5 Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
Magnetic properties of L10 FePt thin film influenced byrecoverable strains stemmed from the polarization of Pb(Mg1/3Nb2/3)O3-PbTiO3 substrate
Li-Wang Liu(刘立旺)1, Cheng-Chao Hu(胡成超)2, Ye-Chuan Xu(徐野川)1, Hou-Bing Huang(黄厚兵)3, Jiang-Wei Cao(曹江伟)4, Linyun Liang(梁林云)5, Wei-Feng Rao(饶伟锋)1
- 1 Department of Materials Physics, and IEMM, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2 College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China;
3 Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
4 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
5 Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
摘要：
The magnetic properties and magnetization reversible processes of L10 FePt (3 nm)/Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) heterostructure were investigated by using the phase field model. The simulation results show that the magnetic coercivities and magnetic domains evolution in the L10 FePt thin film are significantly influenced by the compressive strains stemming from the polarization of single crystal PMN-PT substrate under an applied electric field. It is found that the magnetic coercivities increase with increasing of the compressive strain. A large compressive strain is beneficial to aligning the magnetic moments along the out-of-plane direction and to the enhancement of perpendicular magnetic anisotropy. The variations of magnetic energy densities show that when compressive strains are different at the magnetization reversible processes, the magnetic anisotropy energies and the magnetic exchange energies firstly increase and then decrease, the negative demagnetization energy peaks appear at coercivities fields, and the magnetoelastic energies are invariable at large external magnetic field with the energy maximum appearing at coercivities fields. The variations of the magnetoelastic energies bring about the perpendicular magnetic anisotropy so that the magnetoelastic energy is lower at the large external magnetic fields, whereas the appearance of magnetoelastic energy peaks is due to the magnetization-altered direction from the normal direction of the plane of the L10 FePt thin film at coercivities fields.
中图分类号: (Magnetic recording materials)
- 75.50.Ss