Electromagnetic Functionalization of Wide-Bandgap Dielectric Oxides by Boron Interstitial Doping

Park, D, Rees, G, Wang, H and McConville, C., et al, 2018, 'Electromagnetic Functionalization of Wide-Bandgap Dielectric Oxides by Boron Interstitial Doping', Advanced Materials, vol. 30, no. 39, pp. 1-9.

Document type: Journal Article
Collection: Journal Articles

Title Electromagnetic Functionalization of Wide-Bandgap Dielectric Oxides by Boron Interstitial Doping
Author(s) Park, D
Rees, G
Wang, H
McConville, C., et al,
Year 2018
Journal name Advanced Materials
Volume number 30
Issue number 39
Start page 1
End page 9
Total pages 9
Publisher Wiley-VCH Verlag
Abstract A surge in interest of oxide-based materials is testimony for their potential utility in a wide array of device applications and offers a fascinating landscape for tuning the functional properties through a variety of physical and chemical parameters. In particular, selective electronic/defect doping has been demonstrated to be vital in tailoring novel functionalities, not existing in the bulk host oxides. Here, an extraordinary interstitial doping effect is demonstrated centered around a light element, boron (B). The host matrix is a novel composite system, made from discrete bulk LaAlO3:LaBO3 compounds. The findings show a spontaneous ordering of the interstitial B cations within the host LaAlO3 lattices, and subsequent spin-polarized charge injection into the neighboring cations. This leads to a series of remarkable cation-dominated electrical switching and high-temperature ferromagnetism. Hence, the induced interstitial doping serves to transform a nonmagnetic insulating bulk oxide into a ferromagnetic ionic�electronic conductor. This unique interstitial B doping effect upon its control is proposed to be as a general route for extracting/modifying multifunctional properties in bulk oxides utilized in energy and spin-based applications.
Subject Chemical Sciences not elsewhere classified
Engineering not elsewhere classified
Physical Sciences not elsewhere classified
Keyword(s) first-principle calculations
light element interstitial doping
oxide composites
resistive switching
Stoner ferromagnetism
DOI - identifier 10.1002/adma.201802025
Copyright notice © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN 0935-9648
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