Current 5 year plan (Sonier)

1. A high field low temperature muSR spectrometer (MacLaughlin and Kiefl)

2. Low energy muon beamline 1000 +/s at TRIUMF. (Morenzoni-PSI, Bakule+Matsuda- RIKEN and Brewer)

3. Independent source of 8Li for beta-NMR (MacFarlane and Morris)

Summary of Materials Science Breakout Session

Major components of the last 5 year plan (Sonier)

M20CFI $2.4M +Matching funds=$6M

TRIUMF$2.22M

SR at 15T and 20 mK (MacLaughlin)

Lévy et al. 05

e.g. Field-Induced Superconductivity in URhGee.g. Field-Induced Superconductivity in URhGe

Existing Hightime spectrometer TRIUMF is 8T/2K=4T/KB/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 electronsLow T ground state and elementary excitationsHigh B/T Zeeman energy>> kTnew ground states new properties

Detector arrangement (Kiefl)Top view

Cold finger

F

VetoVeto

TM

sample

10 mm

L

R

77K

4K

B=15T

1. Split Solenoid 15T ~$1M2. Cryostat inserts 2K, 300mK and 20 mK+ detectors ~$1M

Confinement another way to significantly alter electronic and magnetic properties of electrons at

interfaces, near surfaces and thin films (Morenzoni and MacFarlane)

t

A B

LBLA

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

LE muSR in Fe/Ag Magnetic Multilayers

4nm 20nm 4nmH. 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

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.

LE muon Proposals at PSI in 2007 Morenzoni

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

LE muon proposals at PSI cont’d

Structural phase near the surface of SrTiO3 at 150K Salman et al. PRL 96, 147601 (2006)

0 2000 40000.0

1.0

2.0

3.0

0 50 100 150 200 250 300

0.25

0.50

0.75

1.00

Depth [Å]

Impl

ante

d [%

]

Nor

mal

ized

Pol

ariz

atio

n

T [K]

Tc bulk

MacFarlane

Progress in βNMR Project Publications

High Spin Molecules on Surfaces Nano Letters (07)

Near Surface Vortex State of NbSe2

Phys Rev Lett, 98, 167001 (07)

Thin Metal Films Phys Rev Lett 98, 047601 (07)Phys Rev B 75, 073405 (07) Phys Rev Lett 93, 157601 (04)

Surface Effects on Phase Transitions

Phys Rev Lett 96, 147601 (06)

7+ low energy expts,6 w/ accelerated beam,two RIB sourcesONE mass separator

Can’t make a big impact3 weeks/year no good

“ “µSR Ghetto” µSR Ghetto”

MESON HALLBEAM DUMP

150 µA beam dump

BL1BL1

Surface Muon SourceSurface Muon Source Custom Production Targetin a “magnetic bottle” for pions

“Dai Omega” styleHigh Flux Surface µ+ Beam

Low Energy µ+ Beam

150 µA

T2

TNF(moved)

M9

M20

$$$

Brewer

1. Independent source of 8Li for beta-NMR at TNF or proton hall

2. A high field low temperature muSR spectrometer. CFI +Japanese funding?

3. A low energy muon beamline with 1000 +/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.

Conclusion