The spin-wavemodesinnanoscalepermalloystripesarestudiedusingBrillouinlightscatteringforthe case whereanexternalmagneticfieldisappliedtransverselytothelengthofthestripes.Byadjusting the magnitudeofthisexternalfield,theoverallmagnetizationmaybevariedbetweenthe approximatelytransverseandlongitudinalorientations.Theobservedspin-wavefrequenciesare analysed usingarecentlydevelopedmicroscopicdipole-exchangetheorythatisparticularly appropriate whenthemagnetizationdisplaysstrongspatialinhomogeneity.Comparisonbetween theoryandexperimentforthetwosizesofstripesstudiedgivesfairlygoodagreement,allowingthe magneticparametersofpermalloytobededuced.Asmallmagneticanisotropyoftheeasy-planetypeis shown toplayanimportantrole.
Brillouin Light Scattering Study of the Spin Dynamics in Nanoscale Permalloy Stripes: Theory and Experiment
G Gubbiotti;S Tacchi;
2009
Abstract
The spin-wavemodesinnanoscalepermalloystripesarestudiedusingBrillouinlightscatteringforthe case whereanexternalmagneticfieldisappliedtransverselytothelengthofthestripes.Byadjusting the magnitudeofthisexternalfield,theoverallmagnetizationmaybevariedbetweenthe approximatelytransverseandlongitudinalorientations.Theobservedspin-wavefrequenciesare analysed usingarecentlydevelopedmicroscopicdipole-exchangetheorythatisparticularly appropriate whenthemagnetizationdisplaysstrongspatialinhomogeneity.Comparisonbetween theoryandexperimentforthetwosizesofstripesstudiedgivesfairlygoodagreement,allowingthe magneticparametersofpermalloytobededuced.Asmallmagneticanisotropyoftheeasy-planetypeis shown toplayanimportantrole.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
