Spin Electronic Phenomena in Magnetically Doped Perovskites and Complex Oxide Interfaces
EMSL Project ID
19856
Abstract
Semiconductor spintronics has the potential to create entirely new paradigms for analog and digital electronics which may have a significant impact on energy consumption and efficiency. However, novel materials which harness the spin degree of freedom for transport must first be discovered and understood. To this end, we propose to investigate perovskite titanates doped with transition metals with unpaired d electrons, as well as complex oxide interfaces composed of these materials. We will use molecular beam epitaxy and pulsed laser deposition to fabricate MxSrTi1-xO3 and MxSrTi1-xO3/ LaTiO3 (M = Co and Cr) heterointerfaces and superlattices. After growth, the materials will be characterized by XPS, XRD, TEM, RBS, AFM, VSM and Hall effect measurements in the EMSL, as well as XANES and EXAFS at the Advanced Photon Source (APS) at Argonne National Laboratory. The detailed material properties will be compared to magnetic and magneto-electronic properties in order to elucidate structure-function relationships.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2006-07-21
End Date
2009-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Chambers SA. 2009. "Comment on “Origin of Metallic States at the Heterointerface between the Band Insulators LaAlO3 and SrTiO3"." Physical Review Letters 102(19):Art No.: 199703. doi:10.1103/PhysRevLett.102.199703
Chambers SA. 2010. "Epitaxial Growth and Properties of Doped Transition Metal and Complex Oxide Films." Advanced Materials 22(2):219-248. doi:10.1002/adma.200901867
Chambers SA, TC Droubay, CM Wang, KM Rosso, SM Heald, SA Schwartz, KR Kittilstved, and DR Gamelin. 2006. "Ferromagnetism in Oxide Semiconductors ." Materials Today 9(11):28-35.
Droubay T, TC Kaspar, BP Kaspar, and SA Chambers. 2009. "Cation dopant distributions in nanostructures of transition-metal doped ZnO:Monte Carlo simulations." Physical Review. B, Condensed Matter and Materials Physics 79(7):Art. No. 075324.
Heald SM, TC Kaspar, T Droubay, V Shutthanandan, SA Chambers, A Mokhtari, AJ Behan, HJ Blythe, JR Neal, M Fox, and G Gehring. 2009. "X-ray absorption fine structure and magnetization characterization of the metallic Co component in Co-doped ZnO thin films ." Physical Review. B, Condensed Matter 79(7):Art. No. 075202.
Kaspar TC, T Droubay, SM Heald, MH Engelhard, P Nachimuthu, and SA Chambers. 2008. "Hidden Ferromagnetic Secondary Phases in Cobalt-doped ZnO Epitaxial Thin Films." Physical Review. B, Condensed Matter 77(20):201303. doi:10.1103/PhysRevB.77.201303
Kaspar TC, T Droubay, SM Heald, P Nachimuthu, CM Wang, V Shutthanandan, CA Johnson, DR Gamelin, and SA Chambers. 2008. "Lack of ferromagnetism in n-type cobalt-doped ZnO epitaxial thin films." New Journal of Physics 10:Art. No. 055010. doi:10.1088/1367-2630/10/5/055010
Ney A, K Ollefs, S Ye, T Kammermeier, V Ney, TC Kaspar, SA Chambers, F Wilhelm, and A Rogalev. 2008. "Absence of Intrinsic Ferromagnetic Interactions of Isolated and Paired Co Dopant Atoms in Zn1−xCoxO with High Structural Perfection." Physical Review Letters 100(15):Art. No. 157201. doi:10.1103/PhysRevLett.100.157201
Ney A, M Opel, TC Kaspar, V Ney, S Ye, K Ollefs, T Kammermeier, S Bauer, KW Nielsen, ST Goennenwein, MH Engelhard, S Zhou, K Potzger, J Simon, W Mader, SM Heald, JC Cezar, F Wilhelm, A Rogalev, R Gross, and SA Chambers. 2010. "Advanced Spectroscopic Synchrotron Techniques to Unravel the Intrinsic Properties of Dilute Magnetic Oxides: The Case of Co:ZnO." New Journal of Physics 12:Art. No. 013020. doi:10.1088/1367-2630/12/1/013020
Ney A, T Kammermeier, K Ollefs, S Ye, V Ney, TC Kaspar, SA Chambers, F Wilhelm, and A Rogalev. 2010. "Anisotropic Paramagnetism of Co-doped ZnO Epitaxial Films." Physical Review. B, Condensed Matter 81(5):Art. No. 054420. doi:10.1103/PhysRevB.81.054420
Zhu Z, and V Shutthanandan. 2009. "Using C60+ Sputtering to Improve Detection Limit of Nitrogen in Zinc Oxide." Abstract submitted to SIMS XVII, Toronto, Canada. PNNL-SA-65362.