Speaker
Mickael Morin
(Paul Scherrer Institut)
Description
In the past years, magnetism-driven ferroelectricity has been reported in a number of frustrated magnets with spiral magnetic orders. Such materials are of high current interest due to their potential for spintronics and low-power magnetoelectric devices. However, their low magnetic order temperatures (typically <100K) restrict their fields of application.
In this talk I will show that chemical disorder is a powerful tool that can be used to stabilize magnetic spiral phases at higher temperatures. As example of this novel mechanism I will present our recent investigations on YBaCuFeO5, where a controlled manipulation of the Cu/Fe chemical disorder was successfully used to increase the spiral order temperature from 154 to 310K.
Authors
Mickael Morin
(Paul Scherrer Institut)
Marisa Medarde
(Paul Scherrer Institut)
Co-authors
Dr
Emmanuel Canevet
(Paul Scherrer Institut)
Mr
Adrien Raynaud
(Paul Scherrer Institut)
Dr
Marek Bartkowiak
(Paul Scherrer Institut)
Dr
Denis Sheptyakov
(Paul Scherrer Institut)
Dr
Voraksmy Ban
(Paul Scherrer Institut)
Dr
Michel Kenzelmann
(Paul Scherrer Institut)
Dr
Ekaterina Pomjakushina
(Paul Scherrer Institut)
Dr
Kazimierz Conder
(Paul Scherrer Institut)
