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Pulsed Field Facility (PFF). Chuck Mielke. User Support Staff. Fedor Balakirev (Electrical Transport) Jon Betts (Resonant Ultrasound) Scott Crooker (Optics) Neil Harrison (Magnetization) Marcelo Jaime (Heat Capacity) Ross McDonald (GHz/RF and Torque Magnetometry)

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Pulsed Field Facility (PFF)

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Pulsed field facility pff

Pulsed Field Facility (PFF)

Chuck Mielke


User support staff

User Support Staff

  • Fedor Balakirev (Electrical Transport)

  • Jon Betts (Resonant Ultrasound)

  • Scott Crooker (Optics)

  • Neil Harrison (Magnetization)

  • Marcelo Jaime (Heat Capacity)

  • Ross McDonald (GHz/RF and Torque Magnetometry)

  • Albert Migliori (Resonant Ultrasound)

  • Dwight Rickel (Pulse Echo Ultrasound)

  • John Singleton (Magnetization)

  • Chuck Swenson (Pulsed Magnet Design)

  • Vivien Zapf (Thermodynamics and Dielectrics)

  • Chuck Mielke (Single Turn Coil)


Pulsed magnets on the floor 11 2008

Pulsed Magnets on the floor (11/2008)

  • Cell 1 (50 T Mid Pulse, 15 mm, 300 msec)

  • Cell 2 (50 T short pulse, 24mm, 25 msec)

  • Cell 3 (60 T short pulse, 15 mm, 25 msec)

  • Cell 4 (65 T short pulse, 15 mm, 35 msec)

  • 60T Long Pulse, 2500 ms, 32 mm,100 msec flattop

  • 100T Multi Shot, 2500 ms,15mm, 20 msec above 40T

    • Operational to 85 T in February ‘09

  • 300T Single Turn, 10 mm, 0.006 ms

    • Operational to 240 T (routine to 170 T)


Pff field profiles

PFF Field Profiles


Non pulsed magnets at nhmfl pff available to users

Non-Pulsed Magnets at NHMFL-PFF available to Users

  • 20T SC (Zapf)

    • Dil-fridge, VSM, 3He, Cp….

      • Magnet failed in April ‘08

  • 17T SC (Singleton)

    • Cantilever magnetometry, transport, He3, EPR

  • 15T RUS (Betts)

    • Resonant Ultrasound, 3He

  • 15T Staff Lab (Crooker/Jaime/McDonald)

    • Optics, Cp, EPR, He4 flow

  • 14T PPMS (Zapf)

    • VSM, Cp, transport, 4He flow

  • 7T Split Coil Optical Access (Crooker)

    • Optics, 4He


New developments 2008

New Developments 2008

  • 100T MS in maintenance mode

    • The 75 T Development Magnet filled the gap

    • It failed after 240+ shots above 75 T

    • Plans to develop a Duplex Coil to deliver similar fields

    • Call for proposals went out in September

  • 60T LP Fully Operation (to 55 T)

    • Very High Quality Data

      • TDO data is comparable to Hybrid (Sig:Noise)

  • Short Pulse Techniques Expanded

    • Cantilever measurements in L-3He on a rotator!


  • 100 t ms call for proposals

    100 T MS Call for Proposals

    • Call went out 25 September (closed 31 October)

      • 16 Proposals Received

      • 6 will be selected (9 will be ranked)

        • Martin Greven Stanford (SEARCHING FOR QUANTUM OSCILLATIONS IN THE SINGLE-LAYER CUPRATE SUPERCONDUCTOR HgBa2Cu2O4)

        • Gilbert Lonzarich Caimbridge U. (FERMI SURFACE EMERGENCE IN UNDERDOPED YBa2Cu3O6+X CUPRATES)

        • Tito Huber Howard U. (Observation of the quantum limit of surface states of bismuth nanowires)

        • Greg Boebinger FSU (Quantum Criticality and Fermi Surface Reconstruction in LSCO)

        • Ian Fisher Stanford (Quantum oscillation in ternary oxy-pnictides )

        • Eric Bauer LANL (100 T Science: Understanding the Interplay of Magnetism, Superconductivity, and Quantum Criticality)

        • John Singleton LANL (Detection of extra quantum oscillation frequencies in the cuprate superconductors)

        • Graeme Luke McMaster U. (Phase Diagram Determination of the BEC of Triplons System Sr3Cr2O8)

        • Jamie Manson Eastern Washington U. (High-field magnetization studies of low-dimensional quantum magnets)

        • Lia Krusin-Elbaum IBM Watson (Electronic structures of high-Tc Hg-based cuprate superconductors vs. hole doping: Searching for the)

        • Edward Yelland University of St Andrews (High pressure study of quantum oscillations in YBa2Cu4O8)

        • David Larbalestier NHMFL-ASC (Upper Critical Field of single crystal pnictides)

        • John Mydosh University of Cologne, (The role of charge degrees of freedom in Mott insulators)

        • Huiqiu Yuan Zhejiang University (Fermi surface topology and quantum criticality in CeRhIn5)

        • Michael Hoch NHMFL (Triplet-singlet gap-closing in LaCoO3: a new antiferromagnetic phase )

        • Albert Migliori LANL (Pulse-echo ultrasound detection of magnetic-field-induced thermodynamic phase transitions in doped Nd(1-x)CaxB6)


    60t long pulse finely tuned techniques

    60T Long Pulse Finely Tuned Techniques

    HTc Data from

    G. Lonzarich et al.

    Note: Data are Up and Down Sweeps at 1.2 K (no heating)


    65 t cantilever magnetometry

    65 T Cantilever Magnetometry

    User: E. Bauer, Sample:USb2

    60 x100 x 100 mm Sample

    User:I. Fisher, Sample: LaFePO

    Also Available: Angle Dependence at He-3 Temperatures!


    2008 user statistics

    2008 User statistics

    • Record Set with Magnet Days at PFF

      • 1552 total days

    • 173 Magnet Requests

    • 85 Unique PIs

      • 15 Non-US

      • 13 Post-Docs

      • 8 Grad students

      • 2 Undergraduate


    Pff user program summary

    PFF User Program Summary

    • New Short Pulse technique

      • Cantilever M vs. B on a rotator in Liquid 3He

    • Record Number of Magnet Days

      • 1552 Magnet Days

    • Big Magnets

      • 60T LP provides new level of resolution in Pulsed Fields

      • 100 T call has excellent turnout

        • 266% of available magnet time requested!


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