Transport, magnetic, and thermal properties of non-centrosymmetric Yb2Co12P7

TL;DR

This study investigates the magnetic, thermal, and electrical properties of non-centrosymmetric Yb2Co12P7, revealing ferromagnetic ordering of Co at 136 K and a low-temperature transition likely involving Yb ions, indicating complex magnetic behavior.

Contribution

First detailed measurements of magnetic and thermal properties of Yb2Co12P7, highlighting a low-temperature magnetic transition and disordered magnetism.

Findings

Ferromagnetic ordering of Co at 136 K

Magnetic transition below 5 K likely involving Yb ions

Broad specific heat anomaly indicating disordered magnetism

Abstract

We report magnetization and specific heat measurements down to 2 K and electrical resistivity down to millikelvin temperatures on polycrystalline samples of the non-centrosymmetric compound Yb2Co12P7. In addition to the previously reported ferromagnetic ordering of the cobalt sub-lattice at T_C = 136 K we find a magnetic transition below T_M = 5 K that is likely associated with ordering of the Yb ions. The broad nature of the specific heat anomaly suggests disordered magnetism and possible short range correlations well above T_M.