Structure and magnetic properties of epitaxial LiFe5O8 film with different growth temperatures

Gao, Chenyang; Cao, Cuimei; Zhao, Jibin

doi:10.1007/s00339-019-2850-z

Cited by 5 publications

(2 citation statements)

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“…In fact, an enhancement in the magnetization and a decrease in the coercive field has been reported in thinner spinel films, e.g., NiFe 2 O 4 and CoFe 2 O 4 [21][22][23] and LiFe 5 O 8 on MgAl 2 O 4 substrates [10]. The anomalous cation distribution among the tetrahedral and octahedral sites of spinel structures has been thought to account for this phenomenon [14,21], and the partial presence of deficient rocksalt-like structures is assumed to be responsible for the enhanced magnetization [32]. However, in our LiFe 5 O 8 thin films, no chemical modulation or second phase was observed during the TEM investigations, ruling out anomalous Fe 3+ distribution and the formation of rocksalt as the origins of the enhanced Ms.…”

Section: Resultsmentioning

confidence: 97%

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Effect of Film Thickness on Microstructural and Magnetic Properties of Lithium Ferrite Films Prepared on Strontium Titanate (001) Substrates

Liu,

Zhang,

et al. 2023

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Epitaxial lithium ferrite (LiFe5O8) films with different thicknesses were successfully fabricated on strontium titanate (SrTiO3) (001) substrates using the magnetron sputtering deposition technique. The microstructural and magnetic properties of the films were characterized by an advanced transmission electron microscope and a magnetic measurement device. It was found that the formation of structural defects can be influenced by the thickness of the film. In addition to misfit dislocations, orientation domains form in thinner films and twin boundaries appear in thicker films, respectively, contributing to the misfit strain relaxation in the heterosystem. The magnetic measurement showed that the thinner films have enhanced magnetization and a relatively lower coercive field compared with the thicker films containing antiferromagnetic twin boundaries. Our results provide a way of tuning the microstructure and magnetic properties of lithium ferrite films by changing the film thickness.

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Section: Resultsmentioning

confidence: 97%

“…Generally, during the film deposition process, many degrees of freedom can be used to modify the structural and physical properties of the film [11][12][13][14]. Among them, changing the film thickness is a common method to manipulate the strain state of the film [15,16].…”

Section: Introductionmentioning

confidence: 99%