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Magnetism and Structure Evolution in Ni-Zn Ferrites Thin Films - CEMS Study

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Szumiata T., Gzik-Szumiata M., Brzózka K., Górka B., Gawroński M., Javed A., Farman K., Fatima T.

Acta Physica Polonica A

2017

vol. 131

issue 4

836-838

In this work, a ⁵⁷Fe conversion electron Mössbauer spectrometry and X-ray diffraction have been utilized in order to investigate the structural and magnetic order in 500 nm thick Ni-Zn ferrite films deposited on Si(100) substrate by laser ablation. Considering the contributions of the conversion electron Mössbauer subspectra corresponding to the tetrahedral (A) and octahedral (B) sites, the spinel inversion parameter in [Zn_{x}Fe_{1-x}]^{A}[Ni_{1-x}Fe_{1+x}]^{B}O₄ films has been estimated. The hyperfine field (B_{hf}) values in the investigated Ni-Zn ferrites thin films are about 5-8% smaller than those of bulk ferrites, which could be a sign of thermal magnetic relaxations due to the size effects. The distribution of hyperfine magnetic field directions was found to be affected by perpendicular anisotropy.

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1 Acta Physica Polonica A

1 2017

1 Brzózka K.

1 Farman K.

1 Fatima T.

1 Gawroński M.

1 Gzik-Szumiata M.

1 Górka B.

1 Javed A.

1 Szumiata T.

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Magnetism and Structure Evolution in Ni-Zn Ferrites Thin Films - CEMS Study