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Updated: May 1, 2026

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Parimagnetism in HoCo2 and TmCo2.

C M Bonilla1, J Herrero-Albillos, A I Figueroa

  • 1Departamento de Física de la Materia Condensada and Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|March 29, 2014
PubMed
Summary
This summary is machine-generated.

Parimagnetism is common in RCo2 compounds, with unexpected findings of two compensation temperatures above Tc. New magnetic phase diagrams reveal Griffiths phase-like behavior in these heavy rare-earth intermetallics.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Magnetism

Background:

  • RCo2 compounds are known for their ferrimagnetic properties.
  • Understanding the magnetic behavior of heavy rare-earth intermetallics is crucial for materials science.

Purpose of the Study:

  • To investigate the magnetic properties of the RCo2 series (R = Ho, Tm).
  • To explore the phenomenon of parimagnetism and its underlying mechanisms.
  • To develop new magnetic phase diagrams for these compounds.

Main Methods:

  • X-ray magnetic circular dichroism (XMCD) measurements.
  • Longitudinal (χac) and transverse (TS) ac magnetic susceptibility measurements.
  • Temperature and applied magnetic field dependent studies.

Main Results:

  • Parimagnetism is identified as a general behavior in the RCo2 ferrimagnetic series.
  • XMCD results reveal two unexpected compensation temperatures above the Curie temperature (Tc).
  • A small anomaly in the inverse χ'ac curve vanishes under low magnetic fields, suggesting a Griffiths phase-like behavior.

Conclusions:

  • The study confirms parimagnetism as a general characteristic of RCo2 compounds.
  • The discovery of two compensation temperatures provides new insights into magnetic configurations.
  • A Griffiths phase-like scenario is proposed to explain the observed magnetic phenomenology, with amorphous RCo2 serving as an undiluted system model.