Investigation of induced parallel magnetic anisotropy at low deposition temperature in Ba-hexaferrites thin films

Anjum, Safia; Rafique, Muhammad; Khaleeq-ur-Rahman, M.; Siraj, K.; Usman, Arslan; Hussain, S.I.; Naseem, Shahzad

doi:10.1016/j.jmmm.2011.08.059

Cited by 27 publications

(2 citation statements)

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“…The band gap of BGCM is higher than barium hexaferrite (3.18eV) and barium hexaferrite thin films (2.32eV) as reported elsewhere. [37,38] The binding energy of RE-O (RE is the rare earth element) is very high, therefore, incorporation of RE 3+ increases the band gap energy up to some extent. Quantum confinement could play an important role in increase of the band gap.…”

Section: Resultsmentioning

confidence: 99%

Optical and Multiferroic Properties of Gd‐Co Substituted Barium Hexaferrite

Kaur

Sharma

Godara

et al. 2017

Crystal Research and Technology

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This report demonstrates Gd-Co substituted M-type barium hexaferrite, Ba 1-x Gd x Co x Fe 12-x O 19 , successful synthesis adopting sol gel method. Formation of crystalline magneto-plumbite structure and presence of other phases are verified from the X-ray diffraction analysis. Vibrational modes in FT-Raman spectra show the formation of P63/mmc group can be related with magneto-plumbite structure. TEM images of these materials are also discussed. UV-Vis-NIR spectra shows that with material substitution optical energy band gap increases 3.99 eV to 4.28 eV. The observed Fe 3+ ions peak could be correlated to peak line width and occurrence of symmetrical resonance in electron spin resonance (ESR) spectra. The dielectric constant shows high value at low frequency and it becomes constant at high frequency. The retentivity and coercivity of the material decreases with increasing substitution. Multiferroic nature of hexaferrite is analyzed using ferroelectric loops.

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Section: Resultsmentioning

confidence: 99%

Optical and Multiferroic Properties of Gd‐Co Substituted Barium Hexaferrite

Kaur

Sharma

Godara

et al. 2017

Crystal Research and Technology

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“…The absorption spectra of Co 1-x Zn x Cr 0.5 Fe 1.5 O 4 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) samples that have been recorded in the wavelength range 200-800 nm by ultraviolet Visible Spectroscopy (UV-VIS) spectrometer are shown in Figure 10. The optical band gap energy is calculated using the Tauc relation [28]:…”

Section: Uv-visible Spectral Analysismentioning

confidence: 99%

Influence of zinc substitution on structural, elastic, magnetic and optical properties of cobalt chromium ferrites

Zeeshan

Anjum

Waseem

et al. 2021

Materials Science-Poland

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The polycrystalline Co1−xZnxCr0.5Fe1.5O4 series with (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) has been synthesized by conventional ceramic rout method. The structural and elastic properties have been investigated by X-ray diffractometer and Fourier transform spectroscopy. Both XRD and FTIR confirm the formation of single phase cubic spinel ferrites. The cationic distribution for all samples has been proposed. The lattice parameter, X-ray density, hoping length, bond length, and packing factors–in accompaniment with variations in the zinc concentration–have been studied. The IR band position has been explained by the cations involved in the structure. The elastic moduli such as Young's modulus, bulk modulus, rigidity modulus and Poison's ratio have bee calculated using force constants. Scanning electron microscope (SEM) observation conveys information about the agglomeration of particles. The hysteresis curve obtained from vibrating sample magneto meter (VSM) conveys information about the soft nature of prepared compositions. The saturation magnetization decreases with addition of zinc ions and coercivity is almost zero. An increase in band gap energy has been observed with addition of zinc by Ultraviolet Visible Spectroscopy (UV-VIS), which is due to small crystallite size.

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