2007
DOI: 10.1002/pssc.200675926
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Pinning energy of domain walls in MnZn ferrite films

Abstract: Mn Zn ferrite films deposited on (100) MgO substrates by rf sputtering technique with different thicknesses ξ in the range of 30-450 nm were studied. AFM images show grain size increase as film thickness increases. Grains with diameters between L ∼ 70 and 700 nm were observed. The mono and multidomain regime in MnZn ferrite films and their effect on the pinning energy of domain walls are observed via Magneto-optical Kerr Effect, MOKE. At ξ ∼ 300 nm, the coercive field, H c , reaches a maximum value of 80 Oe. T… Show more

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Cited by 4 publications
(4 citation statements)
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“…The domain structure of MnZn ferrites is affected by material properties such as saturation magnetization, magnetocrystalline anisotropy, grain size and distribution of defects [13,14]. The J-A macroscopic model considers hysteresis as the result of energy dissipation during domain wall translation through these defects, referred to as pinning sites [10].…”
Section: State Of Knowledgementioning
confidence: 99%
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“…The domain structure of MnZn ferrites is affected by material properties such as saturation magnetization, magnetocrystalline anisotropy, grain size and distribution of defects [13,14]. The J-A macroscopic model considers hysteresis as the result of energy dissipation during domain wall translation through these defects, referred to as pinning sites [10].…”
Section: State Of Knowledgementioning
confidence: 99%
“…Izydorczyk [20] developed a J-A identification procedure based on a linear approximation of hysteresis loops below the remanence point and using this approach modelled a wide range of commercial ferrites at room and elevated temperatures. Quite recently Calle et al [14] have used the J-A description to interpret the experimental dependences of grain size on the thickness of MnZn ferrite films and to correlate pinning site density with domain boundary energy.…”
Section: State Of Knowledgementioning
confidence: 99%
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“…The limit between the coupled-grain and the single-grain regions is indicated by the dashed line inFig. 3.We used the Jiles-Atherton Model[7,10] to fit the experimental hysteresis loops obtained by MOKE. The Jiles-Atherton Model is based on domain wall motion of an irreversible component due to wall displacement and a reversible component due to domain wall bending.…”
mentioning
confidence: 99%