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ACS Appl Mater Interfaces. 2021 Apr 21;13(15):17971-17977. doi: 10.1021/acsami.1c01344. Epub 2021 Apr 06.

Magnetic Texture in Insulating Single Crystal High Entropy Oxide Spinel Films.

ACS applied materials & interfaces

Yogesh Sharma, Alessandro R Mazza, Brianna L Musico, Elizabeth Skoropata, Roshan Nepal, Rongying Jin, Anton V Ievlev, Liam Collins, Zheng Gai, Aiping Chen, Matthew Brahlek, Veerle Keppens, Thomas Z Ward


  1. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
  2. Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States.
  3. Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.
  4. Department of Physics & Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, United States.
  5. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.

PMID: 33822581 DOI: 10.1021/acsami.1c01344


Magnetic insulators are important materials for a range of next-generation memory and spintronic applications. Structural constraints in this class of devices generally require a clean heterointerface that allows effective magnetic coupling between the insulating layer and the conducting layer. However, there are relatively few examples of magnetic insulators that can be synthesized with surface qualities that would allow these smooth interfaces and precisely tuned interfacial magnetic exchange coupling, which might be applicable at room temperature. In this work, we demonstrate an example of how the configurational complexity in the magnetic insulator layer can be used to realize these properties. The entropy-assisted synthesis is used to create single-crystal (Mg

Keywords: configurational disorder; high entropy oxide; magnetic domain; scanning probe microscopy; spinel ferrite; thin-film epitaxy

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