Note that powders must be encapsulated in your lab before bringing them into the Spin Lab.

For MPMS magnetometry to 400 K:

• for thin films perpendular to field: 5x5mm, 4x4mm; smaller is OK also but will need to be mounted to a larger non-magnetic substrate
• thin films parallel to the field: 4x4mm up to 6x6mm
• powders: typ. 1-10 mg can fit; please email ndilley@purdue.edu so I can provide you with parts to mount the powder in your lab before coming
• crystals/bulk: smaller than 5mm on a side

For MPMS oven magnetometry up to 1000 K:

• thin sample parallel to field: less than 5x5mm; recommend <0.5mm thick, otherwise we will need to use water-based cement to bond the sample to holder.
• Other samples: we can discuss in training

• General Spintronics Lab orientation

• MPMS-3 instrument overview and gallery of data

• MPMS-3 base system description (magnetic field, temperature, sample chamber)

  • Accuracy of magnetic field (QD App Note 1500-011)

  • how uniform is the B-field near zero field?  zero field Hall profiles MPMS3.xlsx

• SQUID Measurement modes

• To request training on either MPMS-3 or PPMS: download this questionnaire , fill it out and email it to ndilley@purdue.edu.

• Training

  • sample mounting for magnetic measurements.pdf

    • OVEN Sample Mounting 1097-203.pdf

  • Setting up measurements

    • special electrical transport sample holder: cable wire diagram

  • Interpreting the data

    • Understanding the columns in the data file: MPMS 3 Data File columns descriptions - from User's Manual.pdf

    • Accuracy of reported magnetic moment (QD App Note 1500-020)

      • associated tool (requires MultiVu installation): MPMS3 Sample Geometry Corrections.exe

    • Macro for removing slope from data and correcting the field remanence: HighFieldSlope and HRemanence Correction.BAS

• Use Case Examples (users, please contribute to these!)

  • PMA CoFeB measured IP and OOP: 2021.01.16 PMA CoFeB M-H Loops.pdf
  • Distinguishing magnetic impurities from real sample magnetism, example from TMD films: TMD M-H Results and MPMS Sample Handling.pdf