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
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