Probing spin waves in Co3O4 nanoparticles for magnonics applications

Mikhail Feygenson; Zhongyuan Huang; Yinguo Xiao; Xiaowei Teng; Wiebke Lohstroh; Nileena Nandakumaran; Jörg C. Neuefeind; Michelle Everett; Andrey A. Podlesnyak; Germán Salazar-Alvarez; Seda Ulusoy; Mario Valvo; Yixi Su; Sascha Ehlert; Asma Qdemat; Marina Ganeva; Lihua Zhang; Meigan C. Aronson

doi:10.1039/d3nr04424f

Probing spin waves in Co₃O₄ nanoparticles for magnonics applications

Mikhail Feygenson, Zhongyuan Huang, Yinguo Xiao, Xiaowei Teng, Wiebke Lohstroh, Nileena Nandakumaran, Jörg C. Neuefeind, Michelle Everett, Andrey A. Podlesnyak, Germán Salazar-Alvarez, Seda Ulusoy, Mario Valvo, Yixi Su, Sascha Ehlert, Asma Qdemat, Marina Ganeva, Lihua Zhang, Meigan C. Aronson

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

Abstract

The magnetic properties of spinel nanoparticles can be controlled by synthesizing particles of a specific shape and size. The synthesized nanorods, nanodots and cubic nanoparticles have different crystal planes selectively exposed on the surface. The surface effects on the static magnetic properties are well documented, while their influence on spin waves dispersion is still being debated. Our ability to manipulate spin waves using surface and defect engineering in magnetic nanoparticles is the key to designing magnonic devices. We synthesized cubic and spherical nanoparticles of a classical antiferromagnetic material Co₃O₄ to study the shape and size effects on their static and dynamic magnetic proprieties. Using a combination of experimental methods, we probed the magnetic and crystal structures of our samples and directly measured spin wave dispersions using inelastic neutron scattering. We found a weak, but unquestionable, increase in exchange interactions for the cubic nanoparticles as compared to spherical nanoparticle and bulk powder reference samples. Interestingly, the exchange interactions in spherical nanoparticles have bulk-like properties, despite a ferromagnetic contribution from canted surface spins.

Original language	English
Pages (from-to)	1291-1303
Number of pages	13
Journal	Nanoscale
Volume	16
Issue number	3
DOIs	https://doi.org/10.1039/d3nr04424f
State	Published - Dec 22 2023

Funding

We thank Paul Hering and Dr Moo-Sung Kim for their help with laboratory X-ray diffraction measurements. We gratefully acknowledge fruitful discussions with Dr Jörg Perβon, Dr Nicolo Violini and Dr Jörg Voigt. We also thank Dr Mark Hagen for his help with CNCS measurements. We thank Dr Vaclav Petříček for modifying Jana2006 program to adopt TOF neutron diffraction data. This work is based upon experiments performed at the TOFTOF instrument operated by Technische Universität München at the Heinz Maier-Leibnitz Zentrum (MLZ), Garching, Germany. A portion of this research at Oak Ridge National Laboratory's Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. This research used JEOL2100F of the Center for Functional Nanomaterials, which is a U.S. DOE Office of Science Facility, at Brookhaven National Laboratory under Contract No. DE-SC0012704. G. S. A. and S. U. thank the financial support of the Swedish Research Agency, VR (Grant No. 2016-06959) and also acknowledge Myfab Uppsala for providing facilities and experimental support. Myfab is funded by the Swedish Research Council (Grant No. 2019-00207) as a national research infrastructure.

Funders	Funder number
MLZ
Scientific User Facilities Division
Swedish Research Agency
Technische Universität München at the Heinz Maier-Leibnitz Zentrum
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Oak Ridge National Laboratory
Brookhaven National Laboratory	DE-SC0012704
Vetenskapsrådet	2016-06959, 2019-00207

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Feygenson, M., Huang, Z., Xiao, Y., Teng, X., Lohstroh, W., Nandakumaran, N., Neuefeind, J. C., Everett, M., Podlesnyak, A. A., Salazar-Alvarez, G., Ulusoy, S., Valvo, M., Su, Y., Ehlert, S., Qdemat, A., Ganeva, M., Zhang, L., & Aronson, M. C. (2023). Probing spin waves in Co₃O₄ nanoparticles for magnonics applications. Nanoscale, 16(3), 1291-1303. https://doi.org/10.1039/d3nr04424f

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title = "Probing spin waves in Co3O4 nanoparticles for magnonics applications",

abstract = "The magnetic properties of spinel nanoparticles can be controlled by synthesizing particles of a specific shape and size. The synthesized nanorods, nanodots and cubic nanoparticles have different crystal planes selectively exposed on the surface. The surface effects on the static magnetic properties are well documented, while their influence on spin waves dispersion is still being debated. Our ability to manipulate spin waves using surface and defect engineering in magnetic nanoparticles is the key to designing magnonic devices. We synthesized cubic and spherical nanoparticles of a classical antiferromagnetic material Co3O4 to study the shape and size effects on their static and dynamic magnetic proprieties. Using a combination of experimental methods, we probed the magnetic and crystal structures of our samples and directly measured spin wave dispersions using inelastic neutron scattering. We found a weak, but unquestionable, increase in exchange interactions for the cubic nanoparticles as compared to spherical nanoparticle and bulk powder reference samples. Interestingly, the exchange interactions in spherical nanoparticles have bulk-like properties, despite a ferromagnetic contribution from canted surface spins.",

author = "Mikhail Feygenson and Zhongyuan Huang and Yinguo Xiao and Xiaowei Teng and Wiebke Lohstroh and Nileena Nandakumaran and Neuefeind, {J{\"o}rg C.} and Michelle Everett and Podlesnyak, {Andrey A.} and Germ{\'a}n Salazar-Alvarez and Seda Ulusoy and Mario Valvo and Yixi Su and Sascha Ehlert and Asma Qdemat and Marina Ganeva and Lihua Zhang and Aronson, {Meigan C.}",

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year = "2023",

month = dec,

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doi = "10.1039/d3nr04424f",

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Feygenson, M, Huang, Z, Xiao, Y, Teng, X, Lohstroh, W, Nandakumaran, N, Neuefeind, JC, Everett, M, Podlesnyak, AA, Salazar-Alvarez, G, Ulusoy, S, Valvo, M, Su, Y, Ehlert, S, Qdemat, A, Ganeva, M, Zhang, L & Aronson, MC 2023, 'Probing spin waves in Co₃O₄ nanoparticles for magnonics applications', Nanoscale, vol. 16, no. 3, pp. 1291-1303. https://doi.org/10.1039/d3nr04424f

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AU - Feygenson, Mikhail

AU - Huang, Zhongyuan

AU - Xiao, Yinguo

AU - Teng, Xiaowei

AU - Lohstroh, Wiebke

AU - Nandakumaran, Nileena

AU - Neuefeind, Jörg C.

AU - Everett, Michelle

AU - Podlesnyak, Andrey A.

AU - Salazar-Alvarez, Germán

AU - Ulusoy, Seda

AU - Valvo, Mario

AU - Su, Yixi

AU - Ehlert, Sascha

AU - Qdemat, Asma

AU - Ganeva, Marina

AU - Zhang, Lihua

AU - Aronson, Meigan C.

PY - 2023/12/22

Y1 - 2023/12/22

N2 - The magnetic properties of spinel nanoparticles can be controlled by synthesizing particles of a specific shape and size. The synthesized nanorods, nanodots and cubic nanoparticles have different crystal planes selectively exposed on the surface. The surface effects on the static magnetic properties are well documented, while their influence on spin waves dispersion is still being debated. Our ability to manipulate spin waves using surface and defect engineering in magnetic nanoparticles is the key to designing magnonic devices. We synthesized cubic and spherical nanoparticles of a classical antiferromagnetic material Co3O4 to study the shape and size effects on their static and dynamic magnetic proprieties. Using a combination of experimental methods, we probed the magnetic and crystal structures of our samples and directly measured spin wave dispersions using inelastic neutron scattering. We found a weak, but unquestionable, increase in exchange interactions for the cubic nanoparticles as compared to spherical nanoparticle and bulk powder reference samples. Interestingly, the exchange interactions in spherical nanoparticles have bulk-like properties, despite a ferromagnetic contribution from canted surface spins.

AB - The magnetic properties of spinel nanoparticles can be controlled by synthesizing particles of a specific shape and size. The synthesized nanorods, nanodots and cubic nanoparticles have different crystal planes selectively exposed on the surface. The surface effects on the static magnetic properties are well documented, while their influence on spin waves dispersion is still being debated. Our ability to manipulate spin waves using surface and defect engineering in magnetic nanoparticles is the key to designing magnonic devices. We synthesized cubic and spherical nanoparticles of a classical antiferromagnetic material Co3O4 to study the shape and size effects on their static and dynamic magnetic proprieties. Using a combination of experimental methods, we probed the magnetic and crystal structures of our samples and directly measured spin wave dispersions using inelastic neutron scattering. We found a weak, but unquestionable, increase in exchange interactions for the cubic nanoparticles as compared to spherical nanoparticle and bulk powder reference samples. Interestingly, the exchange interactions in spherical nanoparticles have bulk-like properties, despite a ferromagnetic contribution from canted surface spins.

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VL - 16

SP - 1291

EP - 1303

JO - Nanoscale

JF - Nanoscale

IS - 3

ER -

Probing spin waves in Co₃O₄ nanoparticles for magnonics applications

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