Authors: Klaus Baberschke
Publish Date: 2006/06/07
Volume: 19, Issue: 1-2, Pages: 77-84
Abstract
Electron paramagnetic resonance EPR in metals has contributed a lot to the understanding of the electronic structure and magnetic properties in dilute alloys as well as in concentrated ferromagnets We recall some pioneering work of the Kazan group and others studying local moment EPR in superconductors An SNS Josephson junction has been used as a microwave generator and as an EPR detector at once EPR was also used to study the Kondo effect in the EPR gshift and linewidth Moreover the high sensitivity of EPR down to 1010 spins allows to study single atomic layers of ferromagnets below and above the Curie temperature T C as well as the spin fluctuations at T C The in situ ferromagnetic resonance FMR in ultrahigh vacuum UHV offers a unique possibility to study the interlayer exchange coupling IEC and spin dynamics of coupled ferromagnetic films Furthermore the magnetic resonance enables us to measure basic parameters of nanoscale magnets in absolute energy units ie μeV/spin The current status of the UHVFMR in nanoscale ferromagnets will be discussed
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