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Ferromagnetism in CuO-ZnO multilayers



C. Sudakar, K. Pradmanabhan, R Naik, G Lawes, Brian Kirby, Sanjiv Kumar, V. M. Naik


We investigated the magnetic properties of CuO–ZnO heterostructures to elucidate the origin of the ferromagnetic signature in Cu doped ZnO. The CuO and ZnO layer thickness were varied from 15 to 150 nm and from 70 to 350 nm⁠, respectively. Rutherford backscattering experiments showed no significant diffusion of either Cu in ZnO or Zn in CuO layers. Magnetic measurements indicate ferromagnetism at 300 K⁠, which depends on the CuO particle size, but not on the CuO–ZnO interfacial area. Polarized neutron reflectometry measurements show that the observed magnetization cannot be accounted for solely by spins localized near the CuO–ZnO interface or in the CuO layer.
Applied Physics Letters


Magnetic semiconductors, Polarized Neutron Reflectometry, Magnetic Multilayers


Sudakar, C. , Pradmanabhan, K. , Naik, R. , Lawes, G. , Kirby, B. , Kumar, S. and Naik, V. (2008), Ferromagnetism in CuO-ZnO multilayers, Applied Physics Letters, [online],, (Accessed April 23, 2024)
Created July 28, 2008, Updated March 22, 2024