Magnetic and Magnetoresistive Behavior of the Ferromagnetic Heavy Fermion YbNi{sub 2}

Journal Article · Mon Apr 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4786-5· OSTI ID:22921327

Escamilla, R. ^[1]; Conde-Gallardo, A. ^[2]

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1. Universidad Nacional Autónoma de México, Instituto de Investigaciones en Materiales (Mexico)
2. Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Departamento de Física (Mexico)

We present a study on the magnetic susceptibility χ(T) and electrical resistance, as a function of temperature and magnetic field R(T, H), of the ferromagnetic heavy fermion YbNi{sub 2}. The X-ray diffraction analysis shows that the synthesized polycrystalline samples crystallizes in the cubic Laves phase structure C15, with a spatial group Fd 3-bar m. The magnetic measurements indicate a ferromagnetic behavior with transition temperature at 9 K. The electrical resistance is metallic-like at high temperatures and no signature of Kondo effect was observed. In the ferromagnetic state, the electrical resistance can be justified by electron-magnon scattering considering the existence of an energy gap in the magnonic spectrum. The energy gap was determined for various applied magnetic fields. Magnetoresistance as a function of applied magnetic field, subtracted from the R(T, H) curves at several temperatures, is negative from 2 K until about 40 K for all applied magnetic fields. The negative magnetoresistance originates from the suppression of magnetic disorder by the magnetic field.

• OSTI ID: 22921327
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 4 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BINARY ALLOY SYSTEMS
ENERGY GAP
LAVES PHASES
MAGNETIC FIELDS
MAGNETIC SUSCEPTIBILITY
MAGNETORESISTANCE
NICKEL COMPOUNDS
SPECTRA
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTERBIUM COMPOUNDS