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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

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Modified apparatus for low temperature/high pressure Mossbauer absorber studies.

C M Liu¹, R Ingalls

¹Department of Physics, University of Washington, Seattle, WA 98195, USA.

The Review of Scientific Instruments

|December 1, 1978

Summary

Researchers modified a Mossbauer spectroscopy system to study absorbers under extreme pressure and temperature. This advancement allows for detailed analysis of material properties in novel conditions.

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Area of Science:

Condensed matter physics
Materials science
Spectroscopy

Background:

Mossbauer spectroscopy is a powerful technique for studying the local environment of atomic nuclei.
Existing systems were limited in their ability to study absorbers under varying pressure and temperature conditions.
Investigating materials under extreme conditions is crucial for understanding their fundamental properties.

Purpose of the Study:

To adapt an existing Mossbauer spectroscopy system to incorporate absorbers.
To enable the study of Mossbauer absorbers as a function of pressure and temperature.
To develop a versatile experimental setup for materials characterization.

Main Methods:

Modification of a Mossbauer spectroscopy system to include absorbers.
Coupling of the Mossbauer source (inside a cryostat) to an external transducer using a bellows.
Conversion of a helium Dewar into a dynamic gas flow cryostat.

Main Results:

The modified system successfully integrates Mossbauer absorbers.
The setup allows for continuous temperature variation from 300 K to 20 K.
The system can achieve and maintain pressures up to 200 kilobars.

Conclusions:

The described method provides a versatile approach to study Mossbauer absorbers under a wide range of pressures and temperatures.
This modification enhances the capability of Mossbauer spectroscopy for materials research.
The developed system opens new avenues for investigating material behavior under extreme conditions.