Current 5 year plan (Sonier)
1. A high field low temperature muSR
spectrometer (MacLaughlin and Kiefl)
2.
Low energy muon beamline 1000
m
+
/s at
TRIUMF. (Morenzoni
-
PSI,
Bakule+Matsuda
-
RIKEN and Brewer)
3. Independent source of
8
Li for beta
-
NMR
(MacFarlane and Morris)
Summary of Materials Science Breakout Session
Major components of
the last 5 year plan
(Sonier)
M20
CFI $2.4M +
Matching funds
=$6M
TRIUMF
$2.22M
m
SR
at 15T and 20 mK (MacLaughlin)
L
é
vy
et al
. 05
e.g. Field
-
Induced Superconductivity in URhGe
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
杲潵湤 獴s瑥t慮搠a汥l敮瑡ey 數捩瑡瑩t湳
䡩杨 䈯吠
†
婥Z浡渠敮e牧r㸾
湥w 杲潵湤 獴s瑥t 湥w 灲潰敲瑩敳
Detector arrangement (Kiefl)
Top view
m
+
䍯汤 晩f来g
F
V整e
V整e
呍
獡sp汥
L
R
㜷7
㑋
䈽ㄵT
ㄮ
印S楴⁓潬敮i楤 ‱ 吠⁾M
㈮
䍲y潳瑡琠楮獥牴r†㉋Ⱐ㌰ね䬠慮搠㈰䬫整e捴潲c 縤ㅍ~†
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
L
B
L
A
Magnetic properties change as a function of thickness and depth
Morenzoni
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 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
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 La
2
-
x
Ce
x
CuO
4
epitaxial
thin films
Conduction Electron Spin Polarization of the Nonmagnetic Layers of FM/NM
Heterostructures
Superconductivity and magnetism in YBa
2
Cu
3
O
7
/PrBa
2
Cu
3
O
7
/YBa
2
Cu
3
O
7
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
µ
SR 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 HfO
2
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 SrTiO
3
at 150K
Salman et al. PRL
96
, 147601 (2006)
0
2000
4000
0.0
1.0
2.0
3.0
0
50
100
150
200
250
300
0.25
0.50
0.75
1.00
Depth [
Å
]
Implanted [%]
Normalized Polarization
T [K]
T
c
bulk
MacFarlane
Progress in
βNMR
Project
Publications
High Spin Molecules on Surfaces
Nano Letters
(07)
Near Surface Vortex State of
NbSe
2
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 sources
ONE mass separator
Can’t make a big impact
3 weeks/year no good
“µSR Ghetto”
MESON HALL
BEAM DUMP
150 µA beam dump
BL1
Surface Muon Source
Custom Production Target
in a “magnetic bottle” for pions
“Dai Omega” style
High Flux Surface µ
+
Beam
Low Energy µ
+
Beam
150 µA
T2
TNF
(moved)
M9
M20
$$$
Brewer
1.
Independent source of
8
Li 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
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.
Conclusion
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