On beating the superparamagnetic limit with exchange bias. R. F. L. Evans1, R. Yanes2, O. Mryasov3, R. W. Chantrell1 and O. Nature. Jun 19;() Beating the superparamagnetic limit with exchange bias. Skumryev V(1), Stoyanov S, Zhang Y, Hadjipanayis G, Givord D. Request PDF on ResearchGate | On beating the superparamagnetic limit with exchange bias | Interest in magnetic nanoparticles has increased.

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On beating the superparamagnetic limit with exchange bias

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Evans 1R. Yanes 2O. Mryasov 3R.

Beating the superparamagnetic limit with exchange bias – Dimensions

Chantrell 1 and O. Get permission to re-use this article.

Evans et al EPL 88 excgange Sign up for new issue notifications. In order to investigate the possibility of “beating the superparamagnetic limit with exchange bias” Skumryev V.

Our results show that exchange-biased systems exhibit an increased energy barrier along the bias direction, with a corresponding decrease of the barrier in the opposite direction.

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For systems with large values of the interfacial coupling, the ferromagnetic core is found to be unconditionally stable in the bias direction. Such a system is ideal for thermal stability since there is no energetically stable reversed state, providing the antiferromagnetic shell is unchanged. In order to permit magnetic recording, which essentially requires a bi-stable system, we propose a heat-assisted recording method, whereby both the ferromagnet FM and antiferromagnet AF are switched.

Beating the superparamagnetic limit with exchange bias.

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