Bulk and Local Magnetic Susceptibility of ErB₁₂

Abstract

High precision measurements of magnetoresistance ∆ρ/ρ = f (T, H) and magnetization M (T, H) were carried out on single crystals of rare-earth dodecaboride ErB12 at temperatures in the interval 1.8-30 K in magnetic fields up to 70 kOe. The high accuracy of the experiments allowed us to perform numerical differentiation and analyze quantitatively the behavior of the derivative d(∆ρ/ρ)/dH = f (T, H) and of the magnetic susceptibility χ(T, H)= dM /dH in paramagnetic and magnetically ordered (antiferromagnetic, T N ≈ 6.7 K and T M ≈ 5.85 K) phases of ErB 12 . It was shown that negative magnetoresistance anomalies observed in present study in paramagnetic state of ErB 12 may be consistently interpreted in the framework of a simple relation between resistivity and magnetization -∆ρ/ρ ∼ M 2 .

Possibility of a new order parameter driven by multipolar moment and Fermi surface evolution in CeGe

“…From the figure, a peak is noted around T I , and below this temperature χ loc decreases. The variation in local moments is related with the changes in electronic properties of the compound [26]. Also, alteration of electronic properties can be a possible cause of the change in Fermi surface.…”