Anomalous Anisotropic Magnetoresistance in Heavy-Fermion PrFe4P12

TL;DR

This study investigates the anisotropic magnetoresistance in PrFe4P12, revealing strong field-dependent effective mass, non-Fermi liquid behavior at specific orientations, and a sharp angular dependence linked to high-field ordered states.

Contribution

It provides new insights into the anisotropic magnetoresistance and effective mass enhancement in PrFe4P12, highlighting the connection to non-Fermi liquid behavior and high-field phases.

Findings

Strong anisotropy of effective mass confirmed

Non-Fermi liquid behavior observed at H||[111]

Angular dependence of magnetoresistance sharply enhanced at H||[111]

Abstract

We have investigated the anisotropy of the magnetoresistance in the Pr-based HF compound PrFe4P12. The large anisotropy of effective mass and its strong field dependence have been confirmed by resistivity measurements. Particularly for H||[111], where the effective mass is most strongly enhanced, the non-Fermi liquid behavior has been observed. Also, we have found the angular dependence of the magnetoresistance sharply enhanced at H||[111], which is evidently correlated with both the non-Fermi liquid behavior and the high-field ordered state (B-phase).