We investigate the electric properties of Pb2FeMoO6 (PFMO), a double perovskite that can be grown in a bulk pure phase only via High Pressure/High Temperature solid-state reaction. The as-obtained PFMO is characterized by a high degree of cationic ordering at the B site between Fe3+ and Mo5+ and a ferrimagnetic transition with TN around 275 K. A semi-metallic to half-metallic transition seems to occur when the ferrimagnetic order arises thanks to the localization of a minority fraction of electrons on the Mo site. In this thermal regime, the system displays asymmetric magneto-resistivity, with selective-polarized carriers promoted by intense negative magnetic fields applied across the Néel transition during the cooling ramp. This cation-ordering related feature vanishes when the Mo-O bond length stabilizes, indicating a strong connection between the magnetic and electrical properties of this compound.

Cationic order-related magnetoresistivity and half-metallicity in bulk Pb2FeMoO6 grown by high pressure synthesis / Coppi, Chiara; Cabassi, Riccardo; Mezzadri, Francesco; Solzi, Massimo; Cugini, Francesco; Gilioli, Edmondo; Delmonte, Davide. - In: JOURNAL OF CRYSTAL GROWTH. - ISSN 0022-0248. - 632:(2024). [10.1016/j.jcrysgro.2024.127629]

Cationic order-related magnetoresistivity and half-metallicity in bulk Pb2FeMoO6 grown by high pressure synthesis

Coppi, Chiara
;
Mezzadri, Francesco;Solzi, Massimo;Cugini, Francesco;Delmonte, Davide
2024-01-01

Abstract

We investigate the electric properties of Pb2FeMoO6 (PFMO), a double perovskite that can be grown in a bulk pure phase only via High Pressure/High Temperature solid-state reaction. The as-obtained PFMO is characterized by a high degree of cationic ordering at the B site between Fe3+ and Mo5+ and a ferrimagnetic transition with TN around 275 K. A semi-metallic to half-metallic transition seems to occur when the ferrimagnetic order arises thanks to the localization of a minority fraction of electrons on the Mo site. In this thermal regime, the system displays asymmetric magneto-resistivity, with selective-polarized carriers promoted by intense negative magnetic fields applied across the Néel transition during the cooling ramp. This cation-ordering related feature vanishes when the Mo-O bond length stabilizes, indicating a strong connection between the magnetic and electrical properties of this compound.
2024
Cationic order-related magnetoresistivity and half-metallicity in bulk Pb2FeMoO6 grown by high pressure synthesis / Coppi, Chiara; Cabassi, Riccardo; Mezzadri, Francesco; Solzi, Massimo; Cugini, Francesco; Gilioli, Edmondo; Delmonte, Davide. - In: JOURNAL OF CRYSTAL GROWTH. - ISSN 0022-0248. - 632:(2024). [10.1016/j.jcrysgro.2024.127629]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2974532
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