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Structural, dielectric and magnetic properties of MFeNbO6 materials (M=Ti, Zr, Hf)

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
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)

University of Kent Author Information

Djafri, Elias.

Creator's ORCID:
CReDIT Contributor Roles:

Arnold, Donna C..

Creator's ORCID: https://orcid.org/0000-0003-0239-5790
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