Issue |
EPL
Volume 104, Number 2, October 2013
|
|
---|---|---|
Article Number | 27011 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/104/27011 | |
Published online | 26 November 2013 |
Spin laser based on magnetic nano-contact array
1 Nanostructure Physics, Royal Institute of Technology - 10691 Stockholm, Sweden
2 Condensed Matter Theory, Gothenburg University - 41296 Gothenburg, Sweden
(a) vk@kth.se (corresponding author)
Received: 2 September 2013
Accepted: 28 October 2013
Arrays of 10 nm diameter point contacts of exchange-coupled spin-majority/spin-minority ferromagnetic metals, integrated into infrared-terahertz range photon resonators, are fabricated and measured electrically and optically. Giant, threshold-type electronic excitations under high-current pumping of the devices are observed as abrupt but reversible steps in device resistance, in many cases in excess of 100%, which correlate with optical emission from the devices. The results are interpreted as due to stimulated spin-flip electron-photon relaxation in the system.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 73.63.Rt – Nanoscale contacts / 75.75.-c – Magnetic properties of nanostructures
© EPLA, 2013
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