SQUID @ 
SQUID
Magnetometer
Egan 430, 617-373-7220
Quantum Design MPMS
XL-5
Specifications:
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5.0 T maximum field
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1e-8 emu relative sensitivity
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AC susceptibility
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Vertical rotator
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EverCool Dewar
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Optical access
Status: Operational
Brochure
Northeastern's new SQUID magnetometer was purchased with contributions
from the Division of Materials Research of the National Science Foundation,
NU Provost's Office, NU College of Arts and Sciences, and NU Department
of Chemistry. Space was provided by the NU Department of Physics.
The instrument employs a closed cycle refrigeration system.
For further information contact Don
Heiman (heiman@neu.edu, 617-373-2912) or Tim Hussey (hussey@neu.edu,
617-373-2859).
The
figure shows the magnetization of the Heusler alloy Co2MnAl.
Below T=400 K the data was obtained with the SQUID and for higher temperatures
using a high temperature VSM at Quantum Design. The electrons in
this material have a high degree of spin polarization and may be useful
as a spin injector for spintronic applications. See Y.J. Chen, D.
Basiaga, J.R. O'Brien, and D. Heiman, Appl. Phys. Lett. 2004.