Cationic disorder: Governing the spin-insulatronic properties of nanocrystalline ZnFe2O4 thin films

Murtaza Bohra; Rémi Arras; Vidyadhar Singh; Nitesh Singh; Anil Annadi; Evropi Toulkeridou; Panagiotis Grammatikopoulos; Hsiung Chou

doi:10.1016/j.mtcomm.2024.108333

Cationic disorder: Governing the spin-insulatronic properties of nanocrystalline ZnFe₂O₄ thin films

Murtaza Bohra^*, Rémi Arras, Vidyadhar Singh, Nitesh Singh, Anil Annadi, Evropi Toulkeridou, Panagiotis Grammatikopoulos, Hsiung Chou

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Controlling cation order/disorder in spinel offers a highly effective means of tailoring material properties by modifying inter- and intra-sub-lattice ionic interactions. In this study, we conducted high-temperature magnetization measurements (300–1000 K) to determine average Curie temperatures (T_C) for nanocrystalline ZnFe₂O₄ thin films. Thermodynamical stability of these films under extreme conditions was investigated by assessing lattice structures, oxygen vacancies, magnetization, and electric resistivity for spin-insulatronic applications. Reversible cation inversion via heat treatments (in-situ and ex-situ) yields tunable ferrimagnetic (FiM) order in ZnFe₂O₄, with T_C ranging from 425 to 710 K. First-principles calculations highlight effective cation inversion mitigating magnetic frustration, promoting collinear FiM ordering, and elevating T_C. Oxygen vacancies further reinforce ferrimagnetism, slightly reducing resistivity through the formation of Fe-3d gap states near the Fermi level. A proposed magnetic nanophase diagram elucidates dominant competing magnetic ground states (cluster spin-glassy state, FiM, and antiferromagnetic) with increasing growth temperature, fostering innovative homo-architectures from multiple ZnFe₂O₄ thin films with diverse functionalities.

Original language	English
Article number	108333
Journal	Materials Today Communications
Volume	38
DOIs	https://doi.org/10.1016/j.mtcomm.2024.108333
State	Published - Mar 2024

Keywords

Cation disorder
Curie temperature
Nanophase diagram
Spin glass transition

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10.1016/j.mtcomm.2024.108333

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title = "Cationic disorder: Governing the spin-insulatronic properties of nanocrystalline ZnFe2O4 thin films",

abstract = "Controlling cation order/disorder in spinel offers a highly effective means of tailoring material properties by modifying inter- and intra-sub-lattice ionic interactions. In this study, we conducted high-temperature magnetization measurements (300–1000 K) to determine average Curie temperatures (TC) for nanocrystalline ZnFe2O4 thin films. Thermodynamical stability of these films under extreme conditions was investigated by assessing lattice structures, oxygen vacancies, magnetization, and electric resistivity for spin-insulatronic applications. Reversible cation inversion via heat treatments (in-situ and ex-situ) yields tunable ferrimagnetic (FiM) order in ZnFe2O4, with TC ranging from 425 to 710 K. First-principles calculations highlight effective cation inversion mitigating magnetic frustration, promoting collinear FiM ordering, and elevating TC. Oxygen vacancies further reinforce ferrimagnetism, slightly reducing resistivity through the formation of Fe-3d gap states near the Fermi level. A proposed magnetic nanophase diagram elucidates dominant competing magnetic ground states (cluster spin-glassy state, FiM, and antiferromagnetic) with increasing growth temperature, fostering innovative homo-architectures from multiple ZnFe2O4 thin films with diverse functionalities.",

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author = "Murtaza Bohra and R{\'e}mi Arras and Vidyadhar Singh and Nitesh Singh and Anil Annadi and Evropi Toulkeridou and Panagiotis Grammatikopoulos and Hsiung Chou",

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year = "2024",

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doi = "10.1016/j.mtcomm.2024.108333",

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T2 - Governing the spin-insulatronic properties of nanocrystalline ZnFe2O4 thin films

AU - Bohra, Murtaza

AU - Arras, Rémi

AU - Singh, Vidyadhar

AU - Singh, Nitesh

AU - Annadi, Anil

AU - Toulkeridou, Evropi

AU - Grammatikopoulos, Panagiotis

AU - Chou, Hsiung

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N2 - Controlling cation order/disorder in spinel offers a highly effective means of tailoring material properties by modifying inter- and intra-sub-lattice ionic interactions. In this study, we conducted high-temperature magnetization measurements (300–1000 K) to determine average Curie temperatures (TC) for nanocrystalline ZnFe2O4 thin films. Thermodynamical stability of these films under extreme conditions was investigated by assessing lattice structures, oxygen vacancies, magnetization, and electric resistivity for spin-insulatronic applications. Reversible cation inversion via heat treatments (in-situ and ex-situ) yields tunable ferrimagnetic (FiM) order in ZnFe2O4, with TC ranging from 425 to 710 K. First-principles calculations highlight effective cation inversion mitigating magnetic frustration, promoting collinear FiM ordering, and elevating TC. Oxygen vacancies further reinforce ferrimagnetism, slightly reducing resistivity through the formation of Fe-3d gap states near the Fermi level. A proposed magnetic nanophase diagram elucidates dominant competing magnetic ground states (cluster spin-glassy state, FiM, and antiferromagnetic) with increasing growth temperature, fostering innovative homo-architectures from multiple ZnFe2O4 thin films with diverse functionalities.

AB - Controlling cation order/disorder in spinel offers a highly effective means of tailoring material properties by modifying inter- and intra-sub-lattice ionic interactions. In this study, we conducted high-temperature magnetization measurements (300–1000 K) to determine average Curie temperatures (TC) for nanocrystalline ZnFe2O4 thin films. Thermodynamical stability of these films under extreme conditions was investigated by assessing lattice structures, oxygen vacancies, magnetization, and electric resistivity for spin-insulatronic applications. Reversible cation inversion via heat treatments (in-situ and ex-situ) yields tunable ferrimagnetic (FiM) order in ZnFe2O4, with TC ranging from 425 to 710 K. First-principles calculations highlight effective cation inversion mitigating magnetic frustration, promoting collinear FiM ordering, and elevating TC. Oxygen vacancies further reinforce ferrimagnetism, slightly reducing resistivity through the formation of Fe-3d gap states near the Fermi level. A proposed magnetic nanophase diagram elucidates dominant competing magnetic ground states (cluster spin-glassy state, FiM, and antiferromagnetic) with increasing growth temperature, fostering innovative homo-architectures from multiple ZnFe2O4 thin films with diverse functionalities.

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Cationic disorder: Governing the spin-insulatronic properties of nanocrystalline ZnFe₂O₄ thin films

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