Facilities - Cryogenics

Cryogenics Facility

Cryogenics
Cryogenics Instrumentation


Cryogenics tanks

The Cryogenics Instrumentation Facility provides easy access to liquid helium and liquid nitrogen to various research groups in NCMN, MRSEC, and other groups at UNL such as the athletic department. Cryogenics are vital and used by research groups for many purposes. There are several superconducting magnets that require a significant amount of liquid helium and liquid nitrogen to operate and many of the high vacuum systems and detectors use liquid nitrogen. Also cryogenics are used in various experiments to measure materials properties at low temperatures. All undergraduates and graduate students involved in low temperature measurement and vacuum systems use the Facility. This Facility enables all of our research on magnetism and magnetic materials, as well as nanoelectronics, solid-state chemistry, etc. It is thus an integral part of NCMN’s research portfolio.

Liquid Nitrogen

A 230-liter supply of liquid nitrogen is maintained at this facility. Researchers can transfer LN2 to their own dewars (typically 1-30 L) as needed and are billed on a per-liter basis.

Liquid Helium

Liquid He orders are delivered to UNL only once a week (Tuesdays) and orders must be submitted to the specialist by the previous Thursday to ensure that the request is placed in time. A delivery location (building and room number) should be specified. LHe can be ordered in 60- or 100-liter containers.

MPMS Squid

The MPMS XL SQUID magnetometer from Quantum Design offers advanced performance in all areas of magnetometry. The Quantum Design MPMS Xl uses a Superconducting Quantum Interference Device (SQUID) magnetometer to monitor very small changes in magnetic flux and to measure the magnetic properties of samples. The system offers a user friendly automated software, a dynamic range in temperature and a sensitivity of 1x10-8 emu. Data can be collected as magnetic moment vs temperature measurement (ZFC-FC, susceptibility) or moment vs magnetic field (hysteresis loops).

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4.5 T magnetic annealing system

This annealing system combines high temperature annealing with a high magnetic field to potentially modify the magnetic properties of thin film and alloys. The system makes use of exchange interactions at high temperature to form new magnetic phases and/or control the crystal growth.

Acknowledgement Text

Agencies including NSF and the University providing partial support of our Nebraska Nanoscale Facilities and NCMN Facilities require that the following words be included at the end of any Acknowledgement section of a paper in which experimental work was done in NNF-NCMN facilities:

The research was performed in part in the Nebraska Nanoscale Facility: National Nanotechnology Coordinated Infrastructure and the Nebraska Center for Materials and Nanoscience, which are supported by the National Science Foundation under Award ECCS: 1542182, and the Nebraska Research Initiative.


Charge Rates for NCMN Cryogenics Instrumentation Facility ($/liter) – 2016/2017
Instrument Equipment
NCMN
Specialist
NCMN
Equipment
Academic
Specialist
Academic
Equipment
Industry
Specialist
Industry
MPMS Squid
6.75 48.75 9.00 65.00 14.00 100.00
Helium – Liquified
3.30 4.40 6.75
Nitrogen
0.75 1.00 1.50

**$1.00 will be charged for each Nitrogen startup


Facility Contact Information

Location & Map

Steve Michalski
Facility Specialist

N102A NANO
Phone: 402-472-7096
smichalski@unl.edu
Steve Michalski
Steve Michalski


David J. Sellmyer
Faculty Supervisor

201 NANO
Phone: 402-472-2407
     or 402-472-7886
dsellmyer@unl.edu
David Sellmyer
David Sellmyer