Introduction to the NHMFL Pulsed Field Facility at LANL

Information on the physical set-up of pulsed field measurements

Read about lock-in amplifiers and their role in your measurements

Information about noise and ways to eliminate it from your measurements

How to collect and evaluate your measurement data

Information on optical spectroscopy

Information about time-resolved optics

Information on de Haas van Alphen Effect measurements

Information on Shubinkov de Haas Effect measurements

Information on Absolute Resistivity measurements

Information on Heat Capacity measurements

Information on RF Penetration Depth measurements

Shubnikov-de Haas Effect
 

Associated Scientists: Chuck Mielke <cmielke@lanl.gov> or (505) 665-1500, Fedor Balakirev <fedor@lanl.gov> or (505) 665-5263

The Shubnikov-de Haas (SdH) effect is a magnetotransport phenomena that occurs in metals in an intense magnetic field. The SdH effect is similar to the de Haas-van Alphen effect in that the signature of the effect is a periodic waveform when plotted as a function of inverse magnetic field (1/H). The "frequency" of the magnetoresistance oscillations (in inverse field space) indicates area of the extremal Fermi surface. The area of the Fermi surface is expressed in tesla.
At the NHMFL-Los Alamos we routinely measure the Fermi surfaces of various compounds by use of the SdH effect. Our techniques usually employ an rf lock-in amplifier , low temperatures, and a milli-second length pulsed field.