Title :
Ultra-high sensitivity B-H looper/AC susceptometer
Author :
Slade, S.B. ; Berkowitz, A.E.
Author_Institution :
Dept. of Phys., California Univ., San Diego, La Jolla, CA, USA
fDate :
9/1/1992 12:00:00 AM
Abstract :
An ultra-high-sensitivity, versatile B-H looper/AC susceptometer is described. The design is based on the well-known inductance technique, and uses modern low-noise components to achieve the high sensitivity. The mechanical assembly is designed for use inside a glass dewar, enabling measurements to be made at any temperature between 4.2 K and 300 K. B-H loops at 5 kHz with up to 3.09 kOe applied field can be measured much faster and with greater sensitivity than with a SQUID (superconducting quantum interference device) magnetometer. Initial AC susceptibility can be measured over a frequency range of 12 Hz to 120 kHz
Keywords :
inductance; magnetic hysteresis; magnetic susceptibility; magnetic variables measurement; 12 Hz to 120 kHz; 4.2 to 300 K; AC susceptibility; AC susceptometer; hysteresis looper; inductance technique; low-noise components; mechanical assembly; ultra-high-sensitivity; Assembly; Glass; Inductance; Interference; Magnetic field measurement; Mechanical variables measurement; Quantum mechanics; SQUIDs; Superconducting devices; Temperature sensors;
Journal_Title :
Magnetics, IEEE Transactions on
