Photovoltage detection of Damon-Eshbach and dipolar edge spin waves of nanomagnets with two-dimensional electron gas system

Najla Almulhem, Maksym Stebliy, Alain Nogaret, Jean-Claude Portal, Harvey Beere, D A Ritchie

Research output: Contribution to journalArticle

Abstract

We report on a photovoltage technique which we use to probe spin excitations on submicron scales where surface effects play a dominant role. The localized spin waves modes were detected through the photovoltage induced in a two-dimensional electron gas system formed in a GaAs/AlGaAs heterojunction. The two-dimensional nature of the detector separates the effects of the in-plane and normal vector components of the magnetization. The high sensitivity of the technique arises from the low electron density and the high electron mobility of 2DEGs relative to metals. The large magnetoresistance further introduces nonlinearity in the Hall coefficient which magnifies the photovoltage. Localized modes of spin waves confined in the magnetostatic potential of the demagnetizing field are observed. We determine the dynamic properties of relevance to high-density information storage.
LanguageEnglish
Article number09TF01
Pages1-4
Number of pages4
JournalJapanese Journal of Applied Physics
Volume57
Issue number09TF01
DOIs
StatusPublished - 6 Aug 2018

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Spin waves
Two dimensional electron gas
photovoltages
magnons
electron gas
Magnetostatics
Electron mobility
Magnetoresistance
Carrier concentration
Heterojunctions
Magnetization
magnetostatics
Detectors
electron mobility
Data storage equipment
dynamic characteristics
aluminum gallium arsenides
Hall effect
heterojunctions
Metals

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Photovoltage detection of Damon-Eshbach and dipolar edge spin waves of nanomagnets with two-dimensional electron gas system. / Almulhem, Najla; Stebliy, Maksym; Nogaret, Alain; Portal, Jean-Claude; Beere, Harvey; Ritchie, D A.

In: Japanese Journal of Applied Physics, Vol. 57, No. 09TF01, 09TF01, 06.08.2018, p. 1-4.

Research output: Contribution to journalArticle

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