Synthesis, Structural, Electronic, and Magnetic Properties of Cubic Perovskite La1−xBa x MnO3 (0.125 ≤ x ≤ 0.875) for Spintronic Devices

  • Nisar Ahmed
  • Sikandar Khan
  • Ayaz Arif Khan
  • Azeem G. Nabi
  • Hussain Ahmed
  • Zia ur Rehman
  • M. H. Nasim
Original Paper
  • 12 Downloads

Abstract

In this study, La0.5Ba0.5MnO3 has been synthesized by hydrothermal method. Crystal structure and morphology are determined by x-ray diffraction and scanning electron microscopy. It is observed that Ba-doped LaMnO3 (LMO) has the same cubic crystal structure as the host material with space group \(\text {Pm}\bar {3}\mathrm {m}\). Half of the La atoms are replaced by Ba in the composition. Further, the electronic and magnetic structures are investigated by solving the Kohn-Sham equation with the full-potential linearized augmented plane wave method (FP-LAPW), with GGA+U approximation for exchange and correlation, for Ba concentration from 12.5 to 87.5%. The system is half-metallic ferromagnetic (FM) up to 55% and then converts into anti-ferromagnetic (AFM). This happens due to the onset of super exchange on increasing Ba concentrations. It is suggested that Ba-doped LMO is the best material for the fabrication of an exchange-biased spin valve. The spacer material can be any non-magnetic cubic perovskite such as BaTiO3 while the FM and AFM layers can be made of Ba-doped LMO with different concentrations of Ba.

Graphical Abstract

Magnetic Phase Diagram of LBMO: A potential candidate for Spin-biased MTJ.

Keywords

Hydrothermal process DFT GGA+U Ferromagnetism Anti-ferromagnetism 

Notes

Acknowledgments

Nisar Ahmed gratefully acknowledges the financial support of the Higher Education Commission (HEC), Pakistan, for Ph.D. (Indigenous) Fellowship under scholarship No. 112-25387-2PS1-477 /HEC/Ind-Sch-Phase-II/2012.

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Physics and Applied Mathematics (DPAM)Pakistan Institute of Engineering and Applied Sciences (PIEAS)NilorePakistan
  2. 2.Department of PhysicsUniversity of AJ&KMuzzafar AbadPakistan
  3. 3.Department of PhysicsUniversity of GujratGujratPakistan
  4. 4.Department of PhysicsAllama Iqbal Open UniversityIslamabadPakistan

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