Abstract
This work reports on the phase diagram study of the dense Kondo system CeB 6 by means of magnetization ( M) and transverse magnetoresistance (MR) measurements in magnetic fields ( B) to 18 T, in the temperature ( T) range from 1.8 to 40 K. The zero field resistivity displays Kondo behavior in the paramagnetic P-phase, while two discontinuities at low T were observed at T Q≈3.5 K and T N≈2.3 K, the boundaries of the antiferro-quadrupolar (AFQ), and antiferromagnetic (AF) phases, respectively. The isothermal transverse MR is large and negative at low T, and it shows a distinct feature when the P–AFQ line of the B– T phase diagram is crossed. Similarly, the M vs. B curves at low temperatures show upward discontinuities at the phase boundary. Both the features in MR and M at the P–AFQ line correlate well in T, revealing the gradual increase of the T for the onset of AFQ ordering with B. No evidence for reentrant behavior could be observed in fields to 18 T.
Highlights
The dense Kondo compound CeB crystallizes in a CsCl structure in which B octahedra occupy the Cl site
The 1 of the AF}AFQ phase transition decreases with B, while the 1 of the AFQ}P
Line should be reentrant, i.e., d1.}$//dB should change from positive in low B to negative in higher B, until the AFQ phase is completely suppressed [4]
Summary
The dense Kondo compound CeB crystallizes in a CsCl structure in which B octahedra occupy the Cl site. The 1 of the AF}AFQ phase transition decreases with B, while the 1 of the AFQ}P Line should be reentrant, i.e., d1.}$//dB should change from positive in low B to negative in higher B, until the AFQ phase is completely suppressed [4].
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