ISSP - The institute for Solid State Physics

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Electromagnetic Measurements Section

The Electromagnetic Measurements Laboratory offers various facilities for measurements of electric and magnetic properties of materials. The followings are types of experiments currently supported in this Laboratory: electrical resistivity, magnetoresistance and Hall effect, magnetization, magneto-quantum oscillatory phenomena, a.c. susceptibility, magnetic torque.


What's new, MPMS
Present status
    MPMS-XL-A
  • Now, reparing is completed.
  • The liq-He consuming becomes proper.
  • The temperature controller works nicely.
    MPMS-XL-B
  • Now, reparing is completed.
  • LT mode works successfully.
  • The temperature controller works nicely.
Future prospects
  • MPMS-XL-A is now open for joint research programs.
  • MPMS-XL-B will be stopped after middle of October, however
  • MPMS-XL-B is now open for researchers in ISSP. If you can take
  • a cost for liq-He, you can use MPMS-XL-B.
  • Note: You must notice to me before your use of MPMS-XL-B.
vacuum sleeve? inlet?
manual position
users manuals for MPMS-XL
manual position
original position of manuals
  • If you can not understand something about MPMS&PPMS,
  • see the users manuals in our room.
  • After reading the manuals, please return them to the original position.
Overview

Main Facilities
  • Superconducting magnet (15/17 T)
  • Split type superconducting magnet (5 T)
  • High homogeneity superconducting magnet (16/18 T) for NMR experiments
  • SQUID magnetometer (7T(XL-A) & 5T(XL-B)) : a usage instruction is here.
  • PPMS (physical properties measurement system (H < 9T))
tips for MPMS
  • MPMS what's new updated 2008.09.23
  • Magnet: -7T < H < 7T (MPMS-XL-A), -5T < H < 5T (MPMS-XL-B)
  • Temperature : 2 K < T < 350K (MPMS-XL-A&B)
  • Option: High Temperature Oven T < 600K (MPMS-XL-A)
  • Option: AC-susceptibility measurement 1Hz < f < 1kHz (MPMS-XL-B)
tips for PPMS
  • Magnet: -9T < H < 9T
  • Temperature : 2 K < T < 350K
  • Electrical transport measurements (AC & DC)
Usage Instruction for MPMS-XL-A

before your measurement
  • fill up the log-note.
  • run "log MPMS". the file name must be noted in the log note. (Utilities/Log MPMS Data/, fill and check the required parameters, log-file name, sampling rate (~100 sec), temperature, field etc.. in the dialog box, and push the "START" button)
  • write any anomalous thing you feel.
in your measurement
  • keep the He-level of MPMS above 50% when you set H >1 T.
  • check the liq-N2 in the outer jacket of MPMS. if there is no liq-N2, please refill it (be sure the exhaust valve sequence when you do liq-N2 filling).
  • keep the amount of liq-He in the vessel more than 10 liter.
  • return the vessel to the cryogenics service laboratry and/or contact to me as soon as possible when the residual liq-He is less than 10 litler.
after your measurement
  • set H =0 Oe.
  • finish the "log MPMS".
  • turn the MPMS standby mode for economical consuming of liq-He (Instrument/Standby}, carefully see the dialog box and push "OK" only one time).
  • convert MPMS to the default setting (DC-setting).
  • do not leave your samples.
  • clean up the desk and the around it to make these more clear than that before you use.
contact
MPMS-XL-A用ログノート
log-note for MPMS-XL-A
  • Touru Yamauchi
  • emag(^.^) ::::: (^.^)=@issp.u-tokyo.ac.jp
  • 63499 (extnsion of ISSP)
  • my mobile phone <= see the log note (emergency only!!)
N2 exhaust valve sequence

窒素ガス排気系
gas exhaust system for trtansfer of liquid-N2
before your liq-N2 transfer to MPMS
  • open the valve, to keep the oxygen in the room.
after the transfer
  • close the valve (must!!), to prevent high humidity atomospher out of the room from comming into MPMS.