Download file (1.19 MB)
Download as zip (1.1 MB)

Collection

Citation

Description:

We investigated interface perpendicular magnetic anisotropy (PMA) in magnetic heterostructures consisting of ferromagnetic metal CoFeB and conductive rock-salt Li–Ti–O (LTO) layers, which can be classified into an unconventional group different from metallic multilayers and tunnel junctions. The rock-salt structure was confirmed by reflection high-energy electron diffraction for the 5 nm thick LTO layers epitaxially grown on a MgO(001) buffer layer. Interface PMA was clearly observed for the LTO/CoFeB heterostructures with post-annealing (PA) above 250 ◦C, and the effective PMA energy density reached 1.18 Merg cm−3 with PA at 300 ◦C. The LTO layer thickness dependence of the resistance area product and tunnel magnetoresistance showed a clear difference in transport properties between the present LTO/CoFeB and the conventional MgO/CoFeB heterostructures, as evidence for the electrical conductivity of LTO in the LTO/CoFeB heterostructure. The conductive LTO can be used as a new building block for a PMA heterostructure for spintronic devices.

Rights:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

  This is the Accepted Manuscript version of an article accepted for publication in Journal of Physics D: Applied Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://dx.doi.org/10.1088/1361-6463/adbb78.

Keyword: spintronics, epitaxial, LiTi2O4, perpendicular magnetic anisotropy

Date published: 2025-04-21

Publisher: IOP Publishing

Journal:

• Journal of Physics D: Applied Physics (ISSN: 00223727) vol. 58 issue. 16

Funding:

• Ministry of Education, Culture, Sports, Science and Technology JPJ011438
• Japan Science and Technology Agency JPMJCR19J4
• New Energy and Industrial Technology Development Organization JPNP16007
• JSPS 22J00871

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5359

First published URL: https://doi.org/10.1088/1361-6463/adbb78

Related item:

Other identifier(s):

Contact agent:

Updated at: 2026-03-10 16:30:32 +0900

Published on MDR: 2026-03-10 13:44:52 +0900