Bakule+Matsuda- RIKEN and Brewer)

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