SQUID - high pressure I

We just got a set of easyLab system from our beloved collaborators in UNLV, which is designed for the Quantum Design SQUID. Here is the product information. (http://www.easylab.co.uk/productsdetails.asp?ID=12&iflgGreenSet=1)

Top left picture shows the high-pressure cell (Mcell 10) attached on the SQUID sample probe, and the top right picture shows the "Mpress" and pressure reader.

I have to say that, when cooling down the pressure cell in the SQUID, the cell keeps loosing from the top screw, and eventually falls off from the probe, even I use Mpress to tight it up to 50 N. Hence, the sample longitudinal scan is changing with time. Maybe I haven't find the trick to avoid it.

SQUID - ambient measurement.

Here is the traditional Quantum Design MPMS XL in our lab at the Glenn T. Seaborg Center at Lawrence Berkeley National Laboratory.

I have some experience on measuring small crystals loaded in a straw with two blocks of "quartz wall" (ambient pressure).

Since the magnetic correction is small for the "quartz wall", for most "magnetic" samples, the voltage vs. longitudinal length scan looks just like the diagrams shown in the users' manual.


However, to play the same measurement under high-pressure is not so easy, since we are going to use a "giant" pressure cell, which is composed of a few parts, and contributes a significant magnetic background to the data (1st order), the slow thermal reaction of the pressure cell maybe another problem that affects precision (2nd order).

Beamline schedule (06/16/09 - 06/22/09)

Beamline schedule (06/16/09 - 06/22/09)
Beamline 11-2 # 1-650-926-8650
(Please note the new location and phone number of this beam run!)

06/16 (Tuesday)
am Bud / Justin / Scott (setup)

06/17 (Wednesday)
9:30 am - 6:00 pm Bud
5:30 pm - 1:00 am Mike / Carley
0:30 am - 9:00 am Justin

06/18 (Thursday)
9:30 am - 6:00 pm Bud / Carley
5:30 pm - 1:00 am Scott / Ben
0:30 am - 9:00 am Justin

06/19 (Friday)
9:30 am - 6:00 pm Bud
5:30 pm - 1:00 am Scott / Ben
0:30 am - 9:00 am Mike

06/20 (Saturday)
9:30 am - 6:00 pm Bud
5:30 pm - 1:00 am Justin
0:30 am - 9:00 am Scott

06/21 (Sunday)
9:30 am - 6:00 pm Bud
5:30 pm - 1:00 am Mike
0:30 am - 9:00 am Scott

06/22 (Monday)
6:30 am (Breakdown) Scott & Justin

Beamline 10-2 Schedule (Apr 2 - 10, 2009)

Beamline schedule (04/02/09 - 04/10/09)
Beamline 10-2 # 1-650-926-5102

04/02 (Thursday)
10:00 am - 6:00 pm Bud / Justin / Ben (setup)
5:30 pm - 1:00 am Justin
00:30 am - 9:00 am Scott

04/03 (Friday)
9:30 am - 6:00 pm Bud / Ben / Carley ?
5:30 pm - 1:00 am Mike
0:30 am - 9:00 am Scott

04/04 (Saturday)
9:30 am - 6:00 pm Bud / Justin / Carley ?
5:30 pm - 1:00 am Mike
0:30 am - 9:00 am Scott

04/05 (Sunday)
9:30 am - 6:00 pm Bud
5:30 pm - 1:00 am Scott
0:30 am - 9:00 am Justin

04/06 (Monday)
up to 9:00 am Justin (Machine Physics)

04/07 (Tuesday)
Machine Physics

04/08 (Wednesday)
10:00 am - 6:00 pm Bud (setup)
5:30 pm - 1:00 am Mike
0:30 am - 9:00 am Justin

04/09 (Thursday)
9:30 am - 6:00 pm Bud
5:30 pm - 1:00 am Mike
0:30 am - 9:00 am Justin

04/10 (Friday)
6:30 am (Breakdown) Justin & Scott

Notes on the LaCoO3 film samples.

LaCoO3 film samples were grown on STO or Nb:STO.

1) Need to take fluorescence EXAFS data using polarized X-ray.
X-ray's polarization is on horizontal axis.
Glancing angle for c-axis; almost right angle for a-axis(here a .eq. b).

2) On taking Co K-edge data, we have to take care of the fluorescence of Ti(~ 4 keV).
Need to adjust number of thin Al foils to reduce Ti effect.

Beamline 10-2 Schedule (Nov 21 - Nov 25, 2008)

Beamline schedule (11/21/08 - 11/25/08)
Beamline 10-2 # 1-650-926-5102

11/21 (Friday)
9:30 am - 6:00 pm Bud / Chris (setup)
5:30 pm - 1:00 am Scott
12:30 am - 9:00 am Justin

11/22 (Saturday)
9:30 am - 6:00 pm Bud / Mike
5:30 pm - 1:00 am Scott
12:30 am - 9:00 am Justin

11/23 (Sunday)
9:30 am - 6:00 pm Bud / Carley
5:30 pm - 1:00 am Scott
12:30 am - 9:00 am Justin

11/24 (Monday)
9:30 am - 6:00 pm Bud
5:30 pm - 1:00 am Mike
12:30 am - 9:00 am Justin

11/25 (Tuesday)
7:30 am (Breakdown) Justin & Scott

Superconductivity Samples' Experiment Information

CeFe4As12
Ce L3 - 10 @ 5724 eV
Fe K - 15 @ 7112 eV

Pr(Os0.9Ru0.1)4Sb12
Pr L3 - 11 @ 5964 eV
(Japan)

Pr(Os0.9Ru0.1)4Sb12
Pr L3 - 11 @ 5964 eV
(UC San Diego)

ZnS:Cu,Cl sample list

GGS22 BLUE/GREEN STANDARD
GGL21 BLUE/GREEN LONG LIFE
GGS42 GREEN STANDARD
GGL11 ORANGE LONG LIFE

Beamline 10-2 Schedule (Apr 9 - Apr 16, 2008)

Beamline schedule (04/09/08 - 04/16/08)
Beamline 10-2 # 1-650-926-5102

04/08 (Tuesday)
Justin delivery some of the boxes to SSRL

04/09 (Wednesday)
9:30 am - 6:00 pm Bud / Chris (setup)
5:30 pm - 1:00 am Lisa
12:30 am - 9:00 am Justin

04/10 (Thursday)
9:30 am - 6:00 pm Bud / Chris / Carley
5:30 pm - 1:00 am Lisa / John
12:30 am - 9:00 am Justin

04/11 (Friday)
9:30 am - 6:00 pm Bud
5:30 pm - 1:00 am John / Robert
12:30 am - 9:00 am Justin

04/12 (Saturday)
9:30 am - 6:00 pm Bud
5:30 pm - 1:00 am Chris
12:30 am - 9:00 am Justin

04/13 (Sunday)
9:30 am - 6:00 pm Bud ? / Carley / John
5:30 pm - 1:00 am Lisa
12:30 am - 9:00 am Chris

04/14 (Monday)
9:30 am - 6:00 pm Bud
5:30 pm - 1:00 am John / Robert
12:30 am - 9:00 am Chris

04/15 (Tuesday)
9:30 am - 6:00 pm Lisa (leave before 4:30)
5:30 pm - 1:00 am Bud (come in ~ 1 pm) / John / Carley
12:30 am - 9:00 am Justin

04/16 (Wednesday)
6:30 am - 8:00 pm Bud / Justin (Breakdown)

The edges we are looking at :
Ce L3 Nd L3 Pr L3
(CuS) Cu-K (ZnS:Cu, Mn, etc.) Cu, Zn, Mn-K
(LaOFeAs) Fe-K

For some of us, you may need these:
The Stanford Synchrotron Radiation Laboratory
2575 Sand Hill Road, Menlo Park, California, 94025, USA

http://www.vta.org/

http://www.scmtd.com/

Beamline 10-2 Schedule (Nov 14 - Nov 20)

Beamline schedule (11/14/07 - 11/20/07)
Beamline 10-2 # 1-650-926-5102

11/14 (Wednesday)
8:30 am - 6:00 pm Bud / Jacob (setup)
5:00 pm - 1:00 am Bud
12:30 am - 9:00 am Justin

11/15 (Thursday)
8:30 am - 6:00 pm Bud / Carley / Anna
5:00 pm - 1:00 am Lisa
12:30 am - 9:00 am Justin

11/16 (Friday)
8:30 am - 6:00 pm Bud / Robert
5:00 pm - 1:00 am Jacob / John
12:30 am - 9:00 am Justin

11/17 (Saturday)
8:30 am - 6:00 pm Lisa
5:00 pm - 1:00 am Justin
12:30 am - 9:00 am Jacob

11/18 (Sunday)
8:30 am - 6:00 pm Bud / John / Robert
5:00 pm - 1:00 am Justin
12:30 am - 9:00 am Jacob

11/19 (Monday)
8:30 am - 6:00 pm Bud
5:00 pm - 1:00 am Bud
12:30 am - 9:00 am Justin

11/20 (Tuesday)
8:30 am - 7:00 pm Bud / Justin (Breakdown)