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Short-range magnetic correlations and parimagnetism in RCo2

TitleShort-range magnetic correlations and parimagnetism in RCo2
Publication TypeJournal Article
Year of Publication2013
AuthorsBartolome, F, Bonilla, CM, Herrero-Albillos, J, Calvo-Almazan, I, Castan, C, Weschke, E, Schmitz, D, Paudyal, D, Mudryk, Y, Pecharsky, V, Gschneidner, KA, Stunault, A, Garcia, LM
JournalEuropean Physical Journal B
Date Published12
Type of ArticleArticle
ISBN Number1434-6028
Accession NumberWOS:000335979900002
Keywordsalloys, behavior, fluctuations, hoco2, paramagnetic erco2, polarized neutron-diffraction, quantum phase-transitions, rare regions, scattering, spin, temperature

X-ray circular magnetic dichroism, polarized neutron diffraction, ac susceptibility, and Seebeck effect have been measured for several members of the RCo2 series (R = Ho, Tm, Er) as a function of temperature and applied magnetic field. The experimental results show robust parimagnetism (a general behaviour along the RCo2 series with R being a heavy rare earth ion) and two reversal temperatures in some systems, which is an unexpected result. Polarised neutron diffraction show differences between results obtained on single crystals or polycrystalline ingots. We propose an interpretation of parimagnetic RCo2 as a Griffiths phase of the high temperature, magnetically ordered, amorphous RCo2 phase.

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