Parimagnetism in HoCo2and TmCo2
| Autor: | Adriana I. Figueroa, D. Schmitz, Fernando Bartolomé, José F. Bartolomé, C. M. Bonilla, I. Calvo-Almazan, Eugen Weschke, L. M. García, C. Castán-Guerrero, Julia Herrero-Albillos |
|---|---|
| Přispěvatelé: | CSIC-UZA - Instituto de Ciencia de Materiales de Aragón (ICMA), European Commission, Ministerio de Economía y Competitividad (España), Consejo Superior de Investigaciones Científicas (España) |
| Rok vydání: | 2014 |
| Předmět: |
Condensed matter physics
Series (mathematics) Magnetic circular dichroism Chemistry Circular Dichroism X-Rays Temperature Signal Processing Computer-Assisted Carbon Dioxide Condensed Matter Physics Magnetic susceptibility Amorphous solid Magnetic field Ion Holmium Condensed Matter::Materials Science Magnetic Fields Models Chemical Ferrimagnetism Thulium Magnets Computer Simulation General Materials Science Anomaly (physics) |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | et al. X-ray magnetic circular dichroism (XMCD), longitudinal (xac ) and transverse (TS) ac magnetic susceptibility have been measured in the RCo2 series (R = Ho, and Tm) as a function of temperature and applied magnetic field. We show that parimagnetism is a general behavior among the RCo2 ferrimagnetic series (R being a heavy rare-earth ion). XMCD results supply evidence of the presence of two compensation temperatures above Tc, defining two different parimagnetic configurations, which is a fully unexpected result. The inverse x?ac curve exhibits a small anomaly which vanishes under low applied magnetic fields. The combination of TS and XMCD measurements allows one to depict new magnetic phase diagrams for these compounds of the RCo 2. series. A new scenario allowing one to understand the observed phenomenology as a Griffiths phase-like behavior is proposed, where the amorphous RCo2 represents the undiluted system case. © 2014 IOP Publishing Ltd. The financial support of MAT2011/23791, Aragonese IMANA E34 (partially funded by the European Social Fund) and the European FEDER funds is acknowledged. C M Bonilla acknowledges a Spanish MINECO grant and C Castán and A I Figueroa acknowledge JAE-Predoc CSIC grants. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|