Magnetoresistance and magnetization anomalies in CeB6

High precision magnetoresistance (MR) Δρ/ρ(H,T) and magnetization M(H,T) measurements have been carried out for well known and typical strongly correlated electron system—cerium hexaboride. The detailed measurements have been fulfilled on single crystalline samples of CeB6 over a wide temperature range T⩾1.8K in magnetic fields up to 70 kOe. It was shown that the MR anomalies in the magnetic heavy fermion compound under investigation can be consistently interpreted in the frameworks of a simple relation between resistivity and magnetization—Δρ/ρ∼M2 obtained by Yosida [Phys. Rev. 107(1957)396]. A local magnetic susceptibility χloc(T,H)=(1/H*(d(Δρ/ρ)/dH))1/2χloc(T,H)=(1/H*(d(Δρ/ρ)/dH))1/2 was deduced directly from the MR Δρ(H,T) measurements and compared with the experimental data of magnetization M(H,T). The magnetic susceptibility dependences χloc(T,H) and χ(T,H) obtained in this study for CeB6 allow us to analyze the complicated H–T magnetic phase diagram of this so-called dense Kondo-system.

H–T magnetic phase diagram for CeB6, VSM-data of vibrating sample magnetometer, MR-data of MR measurements. AF, AFQ, P-antiferromagnetic, antiferro-quadrupole, paramagnetic phases correspondingly.Figure optionsDownload as PowerPoint slide