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Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
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Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
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Published on: January 21, 2016

Variable temperature multimode magnetometer.

J J Winter1, F Rothwarf, H A Leupold

  • 1US Army Electronics Technology and Devices Laboratory (ERADCOM), Fort Monmouth, New Jersey 07703.

The Review of Scientific Instruments
|June 1, 1978
PubMed
Summary
This summary is machine-generated.

A new variable temperature magnetometer was developed for precise measurements in liquid helium environments. This instrument allows for sample analysis across a wide temperature range (1.5-300 K) with efficient sample exchange.

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Area of Science:

  • Physics
  • Materials Science
  • Instrumentation

Background:

  • Superconducting solenoids are crucial for generating high magnetic fields.
  • Accurate magnetic property measurements require controlled temperature environments.
  • Existing magnetometers may have limitations in temperature range or operational flexibility.

Purpose of the Study:

  • To design and construct a versatile variable temperature magnetometer.
  • To enable magnetic measurements within a liquid helium cryostat.
  • To offer multiple operational modes for diverse experimental needs.

Main Methods:

  • Integration of a superconducting solenoid with a variable temperature probe.
  • Development of a liquid helium environment for sample containment.
  • Implementation of three distinct measurement modes: integrating fluxmeter, ballistic magnetometer, and variable temperature operation.

Main Results:

  • Successful construction of a magnetometer capable of operation between 1.5 K and 300 K.
  • Demonstration of three distinct operational modes for versatile magnetic measurements.
  • Facilitation of rapid and efficient sample exchange within the measurement setup.

Conclusions:

  • The developed variable temperature magnetometer provides a flexible and efficient tool for magnetic characterization.
  • This instrument expands the capabilities for studying temperature-dependent magnetic phenomena.
  • The design facilitates ease of use and broad applicability in condensed matter physics research.