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Information × Registration Number 0211U001321, 0109U007342 , R & D reports Title The influence of interparticle interaction on coercivity of the ensemble of oriented superparamagnetic nanoparticles. popup.stage_title Head Timopheev Andrey Alexandrovich, Registration Date 31-01-2011 Organization Institute of physics NASU popup.description2 An anomalous angular dependence of the coercive field of physically nonpercolated granular CoFeB-SiO2 films with oriented anisotropy of the granules, where the presence of the superferromagnetic phase has been established, is observed experimentally at temperatures above the blocking temperature. The angular dependence of the coercive field is similar to that typically observed in the case of magnetization reversal through an inhomogeneous magnetic state of single granules in the ensemble. As the temperature becomes lower than the blocking temperature, the angular dependence changes to that typical of the magnetization reversal through a coherent rotation of granules' magnetic moments. It is shown theoretically that the anomaly is determined by a singularity of the angular dependence of the critical field causing the absolute loss of the superferromagnetic phase stability in the ensemble of weakly interacting ferromagnetic nanoparticles. Product Description popup.authors Тимофієв Андрій Олександрович popup.nrat_date 2020-04-02 Close