Djafri, Elias, Arnold, Donna C., Arevalo-Lopez, Angel M., Fauth, Francois, Huvé, Marielle, Jooris, Romain, Mentré, Olivier (2024) Structural, dielectric and magnetic properties of MFeNbO6 materials (M=Ti, Zr, Hf). Solid State Sciences, 154 . Article Number 107581. ISSN 1293-2558. (doi:10.1016/j.solidstatesciences.2024.107581) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:106131)
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Official URL: https://doi.org/10.1016/j.solidstatesciences.2024.... |
Abstract
We study the structural, magnetic and electronic properties of MFeNbO6 materials (where A = Ti, Zr or Hf). TiFeNbO6 crystallises with the disordered rutile structure with the P42/mnm space group. Increasing the ionic radii of the M4+ cation going from Ti4+ (0.605 Å) to Zr4+ (0.72 Å) and Hf4+ (0.710 Å) results in a buckling of the octahedral chains with these materials crystallising with the disordered α-PbO2 structure (space group Pbcn). In contrast, with previous reports for TiFeNbO6 we find no evidence of relaxor ferroelectric behaviour with all three materials instead exhibiting Maxwell-Wagner-like relaxation. Impedance spectroscopy confirms semiconductor behaviour. Magnetically, all three materials can be described by infinite irregular antiferromagnetic S = 5/2 chains with weak ferromagnetism below 10 K. These chains have random directions of propagation between nearest Fe–Fe neighbours consistent with the disordered nature of these materials. We observed a negative imaginary part of the ac susceptibility related to the defect magnetic topology.
Item Type: | Article |
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DOI/Identification number: | 10.1016/j.solidstatesciences.2024.107581 |
Subjects: |
Q Science Q Science > QD Chemistry |
Divisions: | Divisions > Division of Natural Sciences > Chemistry and Forensics |
Funders: |
Defence Science and Technology Laboratory (https://ror.org/04jswqb94)
Direction Générale de l'Armement (https://ror.org/04wsqd844) ALBA Synchrotron (Spain) (https://ror.org/02j9n6e35) Institut Chevreul (https://ror.org/048k52v18) |
SWORD Depositor: | JISC Publications Router |
Depositing User: | JISC Publications Router |
Date Deposited: | 07 Jun 2024 11:53 UTC |
Last Modified: | 10 Jun 2024 09:13 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/106131 (The current URI for this page, for reference purposes) |
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