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- W2003404814 abstract "Abstract First order reversal curves (FORCs) distributions are a powerful tool for investigating hysteresis and interactions in magnetic systems and have been widely applied. La–Co substitution in barium hexaferrites has also been extensively studied. The most effective substitution to improve the magnetic properties (coercive field and energy product) is given by x = y = 0.2 in the formula Ba 1 - x La x Fe 12 - y Co y O 19 . In this work, this stoichiometry is initially used to obtain a state where more than one phase is present. The magnetic behavior as a function of temperature was studied in order to have an insight into the magnetic interactions that originate a decrease in the magnetic performance of Ba hexaferrite magnets. The sample was structurally characterized by X-ray diffraction (XRD) and magnetically studied in a SQUID magnetometer. FORC distributions were used to study the dependence of the magnetic interactions with the temperature. FORC diagrams performed on the sample at different temperatures exhibit similar characteristics, such as the spread in the h c – h u plane and a spread out of the h c -axes. These features are interpreted in terms of exchange-interacting particles and dipolar interactions, respectively. As the temperature decreases, stronger interactions are noticed among hard and soft phases." @default.
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- W2003404814 date "2009-10-01" @default.
- W2003404814 modified "2023-10-12" @default.
- W2003404814 title "First order reversal curves analysis of the temperature effect on magnetic interactions in barium ferrite with La–Co addition" @default.
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- W2003404814 doi "https://doi.org/10.1016/j.physb.2009.06.134" @default.
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