Jump to main content
Jump to site search

Issue 38, 2016

Negative dissipation gradients in hysteretic materials

Author affiliations

Abstract

Measuring energy dissipation on the nanoscale is of great interest not only for nanomechanics but also to understand important energy transformation and loss mechanisms that determine the efficiency of energy of data storage devices. Fully understanding the magnetic dynamics and dissipation processes in nanomagnets is of major relevance for a number of basic and applied issues from magnetic recording to spin-based sensor devices to biomedical magnetic-based hyperthermia treatments. Here we present experimental evidence for a counter-intuitive monotonical reduction of energy dissipation as the interaction between two nanomagnets is enhanced. This behavior, which takes place when spins are parallel, can be understood in terms of hysteresis phenomena involved in the reorientation of these spins. The measured magnetic losses of about a few femtowatts are in agreement with quasi-static micromagnetic numerical simulations.

Graphical abstract: Negative dissipation gradients in hysteretic materials

Supplementary files

Article information


Submitted
30 May 2016
Accepted
12 Aug 2016
First published
12 Aug 2016

Nanoscale, 2016,8, 16989-16994
Article type
Paper
Author version available

Negative dissipation gradients in hysteretic materials

M. Jaafar, Ó. Iglesias-Freire, P. García-Mochales, J. J. Sáenz and A. Asenjo, Nanoscale, 2016, 8, 16989 DOI: 10.1039/C6NR04356A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements