VLIYaNIE AMPLITUDY MAGNITNOGO POLYa NA KINETIKU PEREMAGNIChIVANIYa MAGNITNYKh NANOChASTITs

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Abstract

Теоретически исследовано влияние амплитуды магнитного поля на кинетику перемагничивания, а также магнитогипертермический эффект, продуцируемый однодоменной ферромагнитной частицей, иммобилизованной в немагнитной среде. Результаты расчетов, основанные на математически регулярной теории Крамерса, показывают, что в частице диссипация W энергии переменного магнитного поля может расти с амплитудой поля H0 быстрее, чем по квадратичному закону W ∼ H20 . Этот вывод, по крайней мере, в принципиальном отношении объясняет недавние эксперименты по магнитной гипертермии в системах обездвиженных частиц, где была обнаружена зависимость W ∼ Hγ0 , γ > 2.

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