What is recorded here?
Giauque and MacDougall demonstrated cooling by adiabatically demagnetizing gadolinium sulfate. In their 1933 report, a sample beginning near 1.5 kelvin reached an indicated 0.25 kelvin. The method first magnetizes a material while heat escapes, then reduces the field after thermal isolation; its magnetic susceptibility provides temperature information.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
The indicated temperature depends on the magnetic thermometer and its calibration. The lower temperature of 0.004 kelvin mentioned in Giauque’s later lecture belongs to subsequent work by de Haas and Wiersma. Debye independently reached related cooling conclusions; this contribution is the named 1933 experiment, not sole invention of the underlying idea.
Read the original work
- Some consequences of low temperature research in chemical thermodynamics
- Attainment of Temperatures Below 1° Absolute by Demagnetization
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People and systems
W. F. Giauque; D. P. MacDougall
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
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English catalogue narrative
Giauque and MacDougall demonstrate refrigeration by adiabatic demagnetization
Giauque and MacDougall demonstrated cooling by adiabatically demagnetizing gadolinium sulfate. In their 1933 report, a sample beginning near 1.5 kelvin reached an indicated 0.25 kelvin. The method first magnetizes a material while heat escapes, then reduces the field after thermal isolation; its magnetic susceptibility provides temperature information.
Scientific scope
The indicated temperature depends on the magnetic thermometer and its calibration. The lower temperature of 0.004 kelvin mentioned in Giauque’s later lecture belongs to subsequent work by de Haas and Wiersma. Debye independently reached related cooling conclusions; this contribution is the named 1933 experiment, not sole invention of the underlying idea.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
W. F. Giauque; D. P. MacDougall
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.