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Related Experiment Video

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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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Weak itinerant antiferromagnetism in PuIn3 explored using 115In nuclear quadrupole resonance.

H Chudo1, G Koutroulakis, H Yasuoka

  • 1Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|December 17, 2013
PubMed
Summary

Nuclear quadrupole resonance (NQR) reveals antiferromagnetic order in PuIn3 at 14 K. Spin fluctuations, analyzed via nuclear spin-lattice relaxation, confirm PuIn3 as a weak itinerant antiferromagnet.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nuclear Physics

Background:

  • Plutonium compounds exhibit complex magnetic behaviors.
  • Understanding magnetic ordering in actinide intermetallics is crucial.

Purpose of the Study:

  • To investigate the magnetic properties of PuIn3 using (115)In nuclear quadrupole resonance (NQR).
  • To determine the nature of magnetic ordering and its underlying mechanisms.

Main Methods:

  • (115)In nuclear quadrupole resonance (NQR) spectroscopy.
  • Measurement of NQR line profiles and nuclear spin-lattice relaxation rates (1/T1).
  • Analysis of temperature-dependent magnetic properties.

Main Results:

  • Observed three of four expected (115)In NQR lines, yielding NQR frequency νQ = 10.45 MHz and asymmetry parameter η = 0 at 20 K.
  • Detected an abrupt change in NQR line profile and 1/T1 at 14 K, signaling the onset of antiferromagnetic order (TN = 14 K).
  • Temperature dependencies of staggered magnetization MQ(T) and 1/T1 below TN are consistent with self-consistent renormalization (SCR) theory.

Conclusions:

  • PuIn3 exhibits long-range antiferromagnetic order below 14 K.
  • Spin fluctuations play a significant role in the finite-temperature behavior of PuIn3.
  • The material behaves as a weak itinerant antiferromagnet, as supported by SCR theory and scaling relations.