Epitaxial strain modulated exchange-bias fields and vertical magnetization shift in unconventional paramagnetic-antiferromagnetic heterostructures
Department of Physics, Indian Institute of Science Education and Research Bhopal Govindpura, Bhopal-462023, India
Received: 15 October 2014
Accepted: 23 January 2015
We report the observation of unusually large exchange-bias fields and a rare vertical magnetization shift, both attributes of spintronic functionalities, in atypical epitaxial bilayers of paramagnetic-metallic CaRuO3 and antiferromagnetic insulating manganite. Both the and the vertical shift, manifesting as a result of the formation of a ferromagnetic layer at the interface of two non-ferromagnetic layers, are more pronounced for tensile epitaxial strain modulated structures. This generated in bilayers with paramagnetic CaRuO3 is significantly larger than that observed in the bilayers formed with the ferromagnetic counterpart SrRuO3, thus, revealing that the originating from the interface ferromagnetic order is predominantly stronger than that induced by the conventional ferromagnetic layers.
PACS: 81.15.Fg – Pulsed laser ablation deposition / 75.70.Cn – Magnetic properties of interfaces (multilayers, superlattices, heterostructures) / 73.21.Ac – Multilayers
© EPLA, 2015