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The pressure effect on magnetism in CeTe(1.82)
Summary
Applied pressure enhances the Kondo temperature and magnetic ordering in CeTe(1.82), suggesting improved coupling between 4f and conduction electrons. This leads to a large magnetoresistance effect, similar to ambient conditions.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Cerium telluride (CeTe1.82) exhibits complex magnetic and transport properties.
- Understanding the influence of external stimuli like pressure is crucial for characterizing its electronic behavior.
Purpose of the Study:
- To investigate the effects of applied pressure on the normal-state transport and magnetic properties of CeTe1.82.
- To elucidate the relationship between pressure, Kondo temperature, magnetic ordering, and electronic interactions.
Main Methods:
- Measurements of electrical resistivity and magnetic susceptibility under hydrostatic pressure up to 9 kbar.
- Analysis of magnetoresistance in the vicinity of magnetic ordering temperatures.
Main Results:
- Applied pressure increases the Kondo temperature (T(K) ~ 170 K), linked to 2D carrier motion within the Te plane.
- Both short-range ferromagnetic (T(SRF) ~ 6 K) and long-range antiferromagnetic (T(N) ~ 4.3 K) ordering temperatures slightly increase with pressure.
- Large magnetoresistance is observed near T(SRF) under magnetic fields, consistent with ambient pressure behavior.
Conclusions:
- Pressure enhances the coupling between 4f and conduction electrons in CeTe1.82.
- The observed phenomena are attributed to pressure-induced modifications of electronic interactions and carrier dynamics.
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