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Related Experiment Videos

Complete elastic tensor through the first-order transformation in U2Rh3Si5.

R G Leisure1, S Kern, F R Drymiotis

  • 1Department of Physics, Colorado State University, Fort Collins, 80523, USA.

Physical Review Letters
|October 4, 2005
PubMed
Summary

The elastic properties of U(2)Rh(3)Si(5) reveal a first-order antiferromagnetic transition at 25.5 K. Strong spin-lattice coupling and magnetic interactions drive this phase change.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Magnetism

Background:

  • Uranium-based intermetallic compounds exhibit complex magnetic and electronic properties.
  • Understanding spin-lattice coupling is crucial for materials with potential technological applications.

Purpose of the Study:

  • To determine the complete elastic tensor of U(2)Rh(3)Si(5) from 5-300 K.
  • To investigate the nature of the antiferromagnetic phase transition and its driving mechanisms.

Main Methods:

  • Elastic moduli measurements using ultrasonic techniques.
  • Temperature-dependent measurements to analyze phase transitions and material properties.

Main Results:

  • The elastic tensor of U(2)Rh(3)Si(5) was fully characterized.

Related Experiment Videos

  • A first-order antiferromagnetic transition was observed at 25.5 K, indicated by sharp steps in elastic moduli.
  • Strong spin-lattice coupling was evidenced by the scaling of elastic moduli with the ordered uranium moment in the antiferromagnetic state.
  • Evidence of ultrasonic wave coupling to uranium's crystal electric field levels above the transition.

    • Conclusions:

    • The first-order phase transition is magnetically driven.
    • A bootstrap mechanism involving the ground state singlet and an excited crystal electric field level likely drives the transition.