Optimal electron, phonon, and magnetic characteristics for low energy thermally induced magnetization switching

ATXITIA, U., OSTLER, Thomas, CHANTRELL, R. W. and CHUBYKALO-FESENKO, O. (2015). Optimal electron, phonon, and magnetic characteristics for low energy thermally induced magnetization switching. Applied Physics Letters, 107 (19), p. 192402.

[img]
Preview
PDF
1.4935416.pdf - Published Version
Available under License All rights reserved.

Download (826kB) | Preview
Official URL: http://aip.scitation.org/doi/abs/10.1063/1.4935416
Link to published version:: 10.1063/1.4935416

Abstract

Using large-scale computer simulations, we thoroughly study the minimum energy required to thermally induced magnetization switching (TIMS) after the application of a femtosecond heat pulse in transition metal-rare earth ferrimagnetic alloys. We find that for an energy efficient TIMS, a low ferrimagnetic net magnetization with a strong temperature dependence is the relevant factor for the magnetic system. For the lattice and electron systems, the key physics for efficient TIMS is a large electron-phonon relaxation time. Importantly, we show that as the cooling time of the heated electrons is increased, the minimum power required to produce TIMS can be reduced by an order of magnitude. Our results show the way to low power TIMS by appropriate engineering of magnetic heterostructures.

Item Type: Article
Identification Number: 10.1063/1.4935416
Depositing User: Thomas Ostler
Date Deposited: 02 Mar 2017 11:23
Last Modified: 14 Jun 2017 22:27
URI: http://shura.shu.ac.uk/id/eprint/15273

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics