Speaker
Jamie Robert Massey
(ETH Zurich - Paul Scherrer Institut)
Description
We use soft x-ray magnetic laminography to characterize the three-dimensional spatial evolution of both the ferromagnetic and antiferromagnetic domains through the FeRh first-order phase transition. We observe different distributions of the nucleating magnetic domains in three-dimensions on heating and cooling. Monte Carlo simulations reveal different sample properties – namely, the sample surface and local variations in the exchange energy - are responsible for the nucleation of domains of differing magnetic order. This asymmetry suggests the microscopic mechanism responsible for the transition differs on heating and cooling, which affects the systems’ macroscopic thermodynamic properties.
Author
Jamie Robert Massey
(ETH Zurich - Paul Scherrer Institut)
Co-authors
Andreas Apseros
Dr
Claire Donnelly
(Max Planck Institute)
Dr
Joakim Reuteler
(ETH Zurich)
Jörg Raabe
Laura Heyderman
(ETH/Paul Scherrer Institute)
Michael Grimes
(PSI - Paul Scherrer Institut)
Peter Derlet
(ETH Zurich - Paul Scherrer Institute)
Mr
Samuel Treves
(University of Basel - Paul Scherrer Institut)
Dr
Simone Finizio
(Paul Scherrer Institut)
Prof.
Thomas Thomson
(University of Manchester)
Valerio Scagnoli
(ETH/Paul Scherrer Institute)
