Magnetic interactions in CoFe2O4 / NiFe2O4 heterostructures

P. D.B. Mills; T. Saerbeck; C. Murrill; A. Kerrigan; J. do Nascimento; D. M. Cheshire; L. Lari; V. K. Lazarov; S. A. Cavill

doi:10.1016/j.jmmm.2025.173147

Magnetic interactions in CoFe₂O₄ / NiFe₂O₄ heterostructures

P. D.B. Mills, T. Saerbeck, C. Murrill, A. Kerrigan, J. do Nascimento, D. M. Cheshire, L. Lari, V. K. Lazarov, S. A. Cavill^*

^*Corresponding author for this work

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

Abstract

Functional oxides are a key class of materials that allows for epitaxial layering in order to combine different material properties. Epitaxial (111)-orientated CoFe₂O₄ / NiFe₂O₄ heterostructures were grown by pulsed laser deposition on Al₂O₃(0001) substrates and their structural and magnetic properties investigated. Whilst X-ray diffraction and electron microscopy demonstrate a single high quality coherent epitaxial film in the growth direction, chemical mapping by EDX and polarised neutron reflectivity analysis confirms chemical intermixing of Co and Ni ions across the interface. The chemical intermixing correlates to the strength of the exchange coupling at the interface that has implications for independent switching of layers in all-oxide spin filters.

Original language	English
Article number	173147
Journal	Journal of Magnetism and Magnetic Materials
Volume	627
Early online date	5 May 2025
DOIs	https://doi.org/10.1016/j.jmmm.2025.173147
Publication status	E-pub ahead of print - 5 May 2025

Bibliographical note

Publisher Copyright:
© 2025 Elsevier B.V.

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10.1016/j.jmmm.2025.173147

Cite this

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title = "Magnetic interactions in CoFe2O4 / NiFe2O4 heterostructures",

abstract = "Functional oxides are a key class of materials that allows for epitaxial layering in order to combine different material properties. Epitaxial (111)-orientated CoFe2O4 / NiFe2O4 heterostructures were grown by pulsed laser deposition on Al2O3(0001) substrates and their structural and magnetic properties investigated. Whilst X-ray diffraction and electron microscopy demonstrate a single high quality coherent epitaxial film in the growth direction, chemical mapping by EDX and polarised neutron reflectivity analysis confirms chemical intermixing of Co and Ni ions across the interface. The chemical intermixing correlates to the strength of the exchange coupling at the interface that has implications for independent switching of layers in all-oxide spin filters.",

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month = may,

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doi = "10.1016/j.jmmm.2025.173147",

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T1 - Magnetic interactions in CoFe2O4 / NiFe2O4 heterostructures

AU - Mills, P. D.B.

AU - Saerbeck, T.

AU - Murrill, C.

AU - Kerrigan, A.

AU - do Nascimento, J.

AU - Cheshire, D. M.

AU - Lari, L.

AU - Lazarov, V. K.

AU - Cavill, S. A.

PY - 2025/5/5

Y1 - 2025/5/5

N2 - Functional oxides are a key class of materials that allows for epitaxial layering in order to combine different material properties. Epitaxial (111)-orientated CoFe2O4 / NiFe2O4 heterostructures were grown by pulsed laser deposition on Al2O3(0001) substrates and their structural and magnetic properties investigated. Whilst X-ray diffraction and electron microscopy demonstrate a single high quality coherent epitaxial film in the growth direction, chemical mapping by EDX and polarised neutron reflectivity analysis confirms chemical intermixing of Co and Ni ions across the interface. The chemical intermixing correlates to the strength of the exchange coupling at the interface that has implications for independent switching of layers in all-oxide spin filters.

AB - Functional oxides are a key class of materials that allows for epitaxial layering in order to combine different material properties. Epitaxial (111)-orientated CoFe2O4 / NiFe2O4 heterostructures were grown by pulsed laser deposition on Al2O3(0001) substrates and their structural and magnetic properties investigated. Whilst X-ray diffraction and electron microscopy demonstrate a single high quality coherent epitaxial film in the growth direction, chemical mapping by EDX and polarised neutron reflectivity analysis confirms chemical intermixing of Co and Ni ions across the interface. The chemical intermixing correlates to the strength of the exchange coupling at the interface that has implications for independent switching of layers in all-oxide spin filters.

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Magnetic interactions in CoFe₂O₄ / NiFe₂O₄ heterostructures

Abstract

Bibliographical note

Access to Document

Other files and links

Embargoed Document

EPSRC Capital Award for Core Equipment

URP (Strategic Capital) 2018/19: Low Temperature Vibrating Sample Magnetometer

RPF SEF 2017/18 Advanced materials growth by integrated Pulsed Laser Deposition and Molecular Beam Epitaxy (PLD/ MBE)

Cite this

Magnetic interactions in CoFe2O4 / NiFe2O4 heterostructures

Abstract

Bibliographical note

Access to Document

Other files and links

Embargoed Document

Projects

EPSRC Capital Award for Core Equipment

URP (Strategic Capital) 2018/19: Low Temperature Vibrating Sample Magnetometer

RPF SEF 2017/18 Advanced materials growth by integrated Pulsed Laser Deposition and Molecular Beam Epitaxy (PLD/ MBE)

Cite this

Magnetic interactions in CoFe₂O₄ / NiFe₂O₄ heterostructures