Use of Mesoscopic Host Matrix to Induce Ferrimagnetism in Antiferromagnetic Spinel Oxide [Use of Mesoscopic Host Matrix for Ferrimagnetism in Antiferromagnetic Spinel Oxide]
- Ulsan National Institute of Science and Technology (UNIST), Ulsan (Republic of Korea)
- Univ. of Cambridge, Cambridge (United Kingdom)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Peking Univ., Beijing (China)
- Purdue Univ., West Lafayette, IN (United States)
Abstract Despite the advances in the methods for fabricating nanoscale materials, critical issues remain, such as the difficulties encountered in anchoring, and the deterioration in their stability after integration with other components. These issues need to be addressed to further increase the scope of their applicability. In this study, using epitaxial mesoscopic host matrices, materials are spatially confined at the nanoscale, and are supported, anchored, and stabilized. They also exhibit properties distinct from the bulk counterparts proving their high quality nanoscale nature. ZnFe 2 O 4 and SrTiO 3 are used as the model confined material and host matrix, respectively. The ZnFe 2 O 4 phases are spatially confined by the SrTiO 3 mesoscopic matrix and have strongly enhanced ferrimagnetic properties as compared to bulk and plain thin films of ZnFe 2 O 4 , with a Curie temperature of ≈500 K. The results of a series of control experiments and characterization measurements indicate that cationic inversion, which originates from the high interface‐to‐volume ratio of the ZnFe 2 O 4 phase in the ZnFe 2 O 4 –SrTiO 3 nanocomposite film, is responsible for the magnetization enhancement. An exchange bias is observed, owing to the coexistence of ferrimagnetic and antiferromagnetic regions in the confined ZnFe 2 O 4 phase. The magnetic properties are dependent on the ZnFe 2 O 4 crystallite size, which can be controlled by the growth conditions.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1476929
- Alternate ID(s):
- OSTI ID: 1417496
- Report Number(s):
- SAND-2018-10375J; 668077
- Journal Information:
- Advanced Functional Materials, Vol. 28, Issue 11; ISSN 1616-301X
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Nanoporous Films and Nanostructure Arrays Created by Selective Dissolution of Water-Soluble Materials
|
journal | September 2018 |
Nanoporous Films and Nanostructure Arrays Created by Selective Dissolution of Water-Soluble Materials. | journalarticle | January 2018 |
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