Observation of a temperature dependent asymmetry in the domain structure of a Pd-doped FeRh epilayer

Observation of a temperature dependent asymmetry in the domain structure of a Pd-doped FeRh epilayer

Using x-ray photoelectron emission microscopy we have observed the coexistence of ferromagnetic and antiferromagnetic phases in a (3 at%)Pd-doped FeRh epilayer. By quantitatively analyzing the resultant images we observe that as the epilayer transforms there is a change in magnetic domain symmetry f...

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Bibliographic Details
Main Authors: C J Kinane, M Loving, M A de Vries, R Fan, T R Charlton, J S Claydon, D A Arena, F Maccherozzi, S S Dhesi, D Heiman, C H Marrows, L H Lewis, Sean Langridge
Format: Article
Language:English
Published: IOP Publishing 2014-01-01
Series:New Journal of Physics
Subjects:
FeRh
magnetic thin films
magnetic phase transitions
nucleation
ferromagnetism
antiferromagnetism
Online Access:https://doi.org/10.1088/1367-2630/16/11/113073
Description
Summary:Using x-ray photoelectron emission microscopy we have observed the coexistence of ferromagnetic and antiferromagnetic phases in a (3 at%)Pd-doped FeRh epilayer. By quantitatively analyzing the resultant images we observe that as the epilayer transforms there is a change in magnetic domain symmetry from predominantly twofold at lower temperatures through to an equally weighted combination of both four and twofold symmetries at higher temperature. It is postulated that the lowered symmetry Ising-like nematic phase resides at the near-surface of the epilayer. This behavior is different to that of undoped FeRh suggesting that the variation in symmetry is driven by the competing structural and electronic interactions in the nanoscale FeRh film coupled with the effect of the chemical doping disorder.
ISSN:1367-2630

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