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Current 5 year plan (Sonier)

Summary of Materials Science Breakout Session . Current 5 year plan (Sonier) 1. A high field low temperature muSR spectrometer (MacLaughlin and Kiefl) Low energy muon beamline 1000 m + /s at TRIUMF. (Morenzoni-PSI, Bakule+Matsuda- RIKEN and Brewer)

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Current 5 year plan (Sonier)

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  1. Summary of Materials Science Breakout Session • Current 5 year plan (Sonier) • 1. A high field low temperature muSR spectrometer (MacLaughlin and Kiefl) • Low energy muon beamline 1000 m+/s at TRIUMF. (Morenzoni-PSI, Bakule+Matsuda- RIKEN and Brewer) • 3. Independent source of 8Li for beta-NMR (MacFarlane and Morris)

  2. Major components of the last 5 year plan (Sonier) M20 TRIUMF $2.22M CFI $2.4M + Matching funds =$6M

  3. Lévy et al. 05 mSR at 15T and 20 mK (MacLaughlin) Existing Hightime spectrometer TRIUMF is 8T/2K=4T/K B/T in New spectrometer ~200 times larger! What is the interest in low T and high B ? CMP is the study of the collective behaviour of electrons Low T ground state and elementary excitations High B/T  Zeeman energy>> kTnew ground states new properties e.g. Field-Induced Superconductivity in URhGe

  4. Detector arrangement (Kiefl) Top view 77K TM L 4K Cold finger B=15T F m+ 10 mm Veto Veto R sample • Split Solenoid 15T ~$1M • Cryostat inserts 2K, 300mK and 20 mK+ detectors ~$1M

  5. t LA LB Confinement another way to significantly alter electronic and magnetic properties of electrons at interfaces, near surfaces and thin films (Morenzoni and MacFarlane) A B

  6. Magnetic properties change as a function of thickness and depthMorenzoni G. Nieuwenhuys, E. Morenzoni, S. Vongtragool, H. Luetkens, A. Suter, Th. Prokscha, F. Galli, M. Hesselberth submitted to PRL 2007

  7. LE muSR in Fe/Ag Magnetic Multilayers 4nm 20nm 4nm H. Luetkens, J. Korecki, E. Morenzoni, T. Prokscha, M. Birke, H. Glückler, R. Khasanov, H.-H. Klauss, T. Slezak, A. Suter, E. M. Forgan, Ch. Niedermayer, and F. J. Litterst Phys Rev. Lett. 91, 017204 (2003). Magnetic field distribution in Ag

  8. Morenzoni LE muon Proposals at PSI in 2007 • Low-energy muon-spin-rotation studies on thin film multilayers consisting of cuprate high-TC sc and FM oxides • Microscopic investigations of a metal-superconductor proximity bilayer • Motion and Pinning of hole-poor pockets in cuprates • Charge differentiation of positive muons in insulators and semiconductors at low implantation energies • Magnetic and superconducting properties of electron-Doped La2-xCexCuO4 epitaxial thin films • Conduction Electron Spin Polarization of the Nonmagnetic Layers of FM/NM Heterostructures • Superconductivity and magnetism in YBa2Cu3O7/PrBa2Cu3O7/YBa2Cu3O7 tri-layers • Spin Freezing in underdoped HTS • Spin Coherent Transport in Organic Spin Valves • Studies of Polymer Surface Dynamics • Influence of electric fields on manganites studied by low-energy muon precession. • Study of Superconducting-Magnetic Coupling in Superconducting Spin Valve Structures • Ferromagnetism in III-V and II-IV-V2 dilute magnetic semiconductors • Proximity effect in Pd/Fe bilayers and Fe/Pd/Fe trilayers.

  9. LE muon proposals at PSI cont’d • Low energy µSR study of moving vortices in type-II superconductors. • Magnetic Penetration in a Superconducting Sandwich and Thin Film • Organic thin-films and solar cells • Investigation of magnetism in HfO2 and related systems • Induced ferromagnetism in superconducting layer of superconductor/ferromagnet heterostructures • Low Energy MuSR Studies of Mn doped GaAs • Measurement of the Magnetic Properties of a mono-Layer of Single Molecule Magnets • Magnetism in Proton-Irradiated HOPG Carbon • A direct measurement of the interplay between ferromagnetism and superconductivity at atomically flat oxide interfaces. • Spin-polarized injection from a magnetic semiconductor into a nonmagnetic semiconductor: spintronics via μSR

  10. MacFarlane Structural phase near the surface of SrTiO3 at 150KSalman et al. PRL 96, 147601 (2006) Tc bulk

  11. Progress in βNMR

  12. 7+ low energy expts, 6 w/ accelerated beam, two RIB sources ONE mass separator Can’t make a big impact 3 weeks/year no good

  13. Brewer MESON HALL BEAM DUMP 150 µA beam dump TNF (moved) $$$ Low Energy µ+ Beam “Dai Omega” style High Flux Surface µ+ Beam Surface Muon Source Custom Production Target in a “magnetic bottle” for pions M20 “µSR Ghetto” T2 M9 BL1 150 µA

  14. Conclusion • Independent source of 8Li for beta-NMR at TNF or proton hall • A high field low temperature muSR spectrometer. CFI +Japanese funding? • 3. A low energy muon beamline with 1000 m+/s at the sample could probably be made here at TRIUMF. However the money might be better spent helping to build a low energy muon at J-PARC.

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