Probing the magnetic profile of diluted magnetic semiconductors using polarized neutron reflectivity.

Luo, X; Tseng, L T; Lee, W T; Tan, T T; Bao, N N; Liu, R; Ding, J; Li, S; Lauter, V; Yi, J B

Luo, X; Tseng, L T; Lee, W T; Tan, T T; Bao, N N; Liu, R; Ding, J; Li, S; Lauter, V; Yi, J B.

Afiliación

Luo X; School of Materials Science and Engineering, UNSW, Sydney, NSW, 2052, Australia.
Tseng LT; School of Materials Science and Engineering, UNSW, Sydney, NSW, 2052, Australia.
Lee WT; Bragg Institute, ANSTO, New Illawarra Road, Lucas Heights, NSW, 2234, Australia.
Tan TT; School of Materials Science and Engineering, UNSW, Sydney, NSW, 2052, Australia.
Bao NN; Department of Materials Science and Engineering, National University of Singapore, 119260, Singapore, Singapore.
Liu R; SIMS Facility, Office of the Deputy-Vice Chancellor (Research and Development), Western Sydney University, Locked Bag 1797, Penrith, New South Wales, 2751, Australia.
Ding J; Department of Materials Science and Engineering, National University of Singapore, 119260, Singapore, Singapore.
Li S; School of Materials Science and Engineering, UNSW, Sydney, NSW, 2052, Australia.
Lauter V; Quantum Condensed Matter Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA.
Yi JB; School of Materials Science and Engineering, UNSW, Sydney, NSW, 2052, Australia. jiabao.yi@unsw.edu.au.

Sci Rep ; 7(1): 6341, 2017 07 24.

Article en En | MEDLINE | ID: mdl-28740239

RESUMEN

Room temperature ferromagnetism has been observed in the Cu doped ZnO films deposited under an oxygen partial pressure of 10-3 and 10-5 torr on Pt (200 nm)/Ti (45 nm)/Si (001) substrates using pulsed laser deposition. Due to the deposition at relatively high temperature (873 K), Cu and Ti atoms diffuse to the surface and interface, which significantly affects the magnetic properties. Depth sensitive polarized neutron reflectometry method provides the details of the composition and magnetization profiles and shows that an accumulation of Cu on the surface leads to an increase in the magnetization near the surface. Our results reveal that the presence of the copper at Zn sites induces ferromagnetism at room temperature, confirming intrinsic ferromagnetism.

Texto completo

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Rep Año: 2017 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido

Texto completo

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Buscar en Google