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Spin Seebeck effect in insulating SrFeO3–δ films

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.5097422· OSTI ID:1543280
In SrFeO3–δ, noncollinear antiferromagnetic spin textures have led to the observation of the topological Hall effect and may give rise to novel magnetic excitations. Here, we measured the spin Seebeck effect in epitaxial, oxygen reduced SrFeO3–δ films, which are nonferromagnetic and insulating at low temperatures. Here, we detected a spin Seebeck signal below 300K and the signal is enhanced below approximate to 100K, near the ordering temperature of incommensurate antiferromagnetism found in bulk single crystals of SrFeO3–δ. The spin Seebeck signal increases in magnitude and develops a nonlinear dependence on the magnetic field at lower temperatures. Control experiments were used to verify that the measured signal arises from a spin current and to rule out magnetic proximity effects. Our work shows a detectable spin Seebeck signal in nonferromagnetic insulator SrFeO3–δ.
Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1543280
Alternate ID(s):
OSTI ID: 1527047
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 24 Vol. 114; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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