Atomic-scale observation of calcium occupation in spinel cobalt ferrite towards the regulation of intrinsic magnetic properties

Bai, Guohua; Zhong, Weijia; Zhang, Zhenhua; Bandaru, Sateesh; Fan, Xiuyuan; Liu, Xiaolian; Zhang, Xuefeng

doi:10.1039/d3nr04838a

Nanoscale

2023

DOI: 10.1039/d3nr04838a

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Atomic-scale observation of calcium occupation in spinel cobalt ferrite towards the regulation of intrinsic magnetic properties

Guohua Bai,

Weijia Zhong,

Zhenhua Zhang

et al.

Abstract: Spinel ferrites have drawn intensive attention because of their adjustable magnetic properties by ion doping, among which calcium (Ca) is an essential dopant that is widely employed in massive production....

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2024

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Cited by 3 publications

References 60 publications

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Modulating resistive switching in Ni0.5Zn0.5Fe2O4 memristors: The role of manganese doping concentrations

Zhang,

Ren,

Pan

et al. 2024

Ceramics International

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Modulating resistive switching in Ni0.5Zn0.5Fe2O4 memristors: The role of manganese doping concentrations

Zhang,

Ren,

Pan

et al. 2024

Ceramics International

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Effect of Ca2+ doping and annealing temperature on the structure, morphology and magnetic behavior of CaxCo1-xFe2O4/SiO2 nanocomposites

Dippong,

Petean,

Deac

et al. 2024

Results in Physics

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Interface Structures on Mechanically Polished Surface of Spinel Ferrite and Its Effect on the Magnetic Domains

Xu,

Zhang,

Fan

et al. 2024

Materials

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Soft magnetic spinel ferrites are indispensable parts in devices such as transformers and inductors. Mechanical surface processing is a necessary step to realize certain shapes and surface roughness in producing the ferrite but also has a negative effect on the magnetic properties of the ferrite. In the past few years, a new surface layer was always believed to form during the mechanical surface processing, but the change of atomic structure on the surface and its effect on the magnetic structure remain unclear. Herein, an interface structure consisting of a rock-salt sublayer, distorted NiFe2O4 sublayer, and pristine NiFe2O4 was found to form on mechanically polished single-crystal NiFe2O4 ferrite. Such an interface structure is produced by phase transformation and lattice distortion induced by the mechanical processing. The magnetic domain observation and electrical property measurement also indicate that the magnetic and electrical anisotropy are both enhanced by the interface structure. This work provides deep insight into the surface structure evolution of spinel ferrite by mechanical processing.

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Atomic-scale observation of calcium occupation in spinel cobalt ferrite towards the regulation of intrinsic magnetic properties

Abstract: Spinel ferrites have drawn intensive attention because of their adjustable magnetic properties by ion doping, among which calcium (Ca) is an essential dopant that is widely employed in massive production....

Cited by 3 publications

References 60 publications

Modulating resistive switching in Ni0.5Zn0.5Fe2O4 memristors: The role of manganese doping concentrations

Modulating resistive switching in Ni0.5Zn0.5Fe2O4 memristors: The role of manganese doping concentrations

Effect of Ca2+ doping and annealing temperature on the structure, morphology and magnetic behavior of CaxCo1-xFe2O4/SiO2 nanocomposites

Interface Structures on Mechanically Polished Surface of Spinel Ferrite and Its Effect on the Magnetic Domains

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