Epitaxial multilayers of ferromagnetic insulators with nonmagnetic metals and superconductors

Gordon M. Roesler Jr.; M. E. Filipkowski; P. R. Broussard; Yves U. Idzerda; Michael S. Osofsky; Robert J. Soulen Jr.

doi:10.1117/12.179175

29 June 1994 Epitaxial multilayers of ferromagnetic insulators with nonmagnetic metals and superconductors

Gordon M. Roesler Jr., M. E. Filipkowski, P. R. Broussard, Yves U. Idzerda, Michael S. Osofsky, Robert J. Soulen Jr.

Proceedings Volume 2157, Superconducting Superlattices and Multilayers; (1994) https://doi.org/10.1117/12.179175
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Novel electronic properties are observed in metals in contact with the ferromagnetic insulator europium monoxide (EuO). We have successfully prepared epitaxial bilayers and multilayers involving EuO and the metals V or Ag. With metal layers of 100 angstroms thickness or less, these structures exhibit a slope discontinuity in their resistance versus temperature at 90 K for V/EuO interfaces and at 50 K for Ag/EuO interfaces. For metal layers less than about 40 angstroms, a feature is also apparent in R(T) at 70 K, the Curie temperature of bulk EuO. The slope discontinuities are reminiscent of those observed at the Curie temperature of ferromagnetic metals. Kerr effect measurements confirm that the EuO exhibits ferromagnetic ordering at 70 K. In V/EuO structures, the V still displays superconductivity with a slightly depressed transition temperature. This suggests that such metal/ferromagnetic insulator structures may be used to prepare artificial ferromagnetic superconductors. The resistive transition is incomplete, suggesting small regions of isolated superconductivity within the sample, as has been predicted for certain special cases when a superconductor is in proximity to a ferromagnet.

Citation Download Citation

Gordon M. Roesler Jr., M. E. Filipkowski, P. R. Broussard, Yves U. Idzerda, Michael S. Osofsky, and Robert J. Soulen Jr. "Epitaxial multilayers of ferromagnetic insulators with nonmagnetic metals and superconductors", Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); https://doi.org/10.1117/12.179175

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available