Uniaxial Strain Control of Bulk Ferromagnetism in Rare-Earth Titanates

Scientific paper - Original scientific paper

• Author: Ana Najev
• Author: S. Hameed
• Author: D. Gautreau
• Author: Z. Wang
• Author: J. Joe
• Author: Miroslav Požek
• Author: T. Birol
• Author: R. M. Fernandes
• Author: M. Greven
• Author: Damjan Pelc
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

The perovskite rare-earth titanates are model Mott insulators with magnetic ground states that are very sensitive to structural distortions. These distortions couple strongly to the orbital degrees of freedom and, in principle, it should be possible to tune the superexchange and the magnetic transition with strain. We investigate the representative system ðY ; La ; CaÞTiO3, which exhibits low crystallographic symmetry and no structural instabilities. From magnetic susceptibility measurements of the Curie temperature, we demonstrate direct, reversible, and continuous control of ferromagnetism by influencing the TiO6 octahedral tilts and rotations with uniaxial strain. The relative change in TC as a function of strain is well described by ab initio calculations, which provides detailed understanding of the complex interactions among structural, orbital, and magnetic properties in rare-earth titanates. The demonstrated manipulation of octahedral distortions opens up far-reaching possibilities for investigations of electron-lattice coupling, competing ground states, and magnetic quantum phase transitions in a wide range of quantum materials.

• Keywords (english): titanates; uniaxial stress; quantum critical point; magnetization
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review Letters
• Numbering: vol. 128, no. 16, 167201
• p-ISSN: 0031-9007
• e-ISSN: 1079-7114
• DOI: https://doi.org/10.1103/PhysRevLett.128.167201
• URN:NBN: urn:nbn:hr:217:556268
• Publication: 2022
• Project: Number: IP-2018-01-2970; Title (croatian): Mikroskopska istraživanja induciranih faza u jako koreliranim elektronskim sustavima; Title (english): Microscopic study of induced phases in Strongly correlated electronic systems; Acronym: MicroS; Leader: Miroslav Požek; Jurisdiction: Croatia; Funding stream: Research Projects
• Document URL: https://link.aps.org/doi/10.1103/PhysRevLett.128.167201
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2022 American Physical Society. Received 13 May 2021; revised 26 October 2021; accepted 4 March 2022; published 20 April 2022.
• Created on: 2024-08-31 18:12:09