The 11B Nuclear Magnetic Resonance in CeB6 Single Crystal

概要

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NMR measurements were performed on the 11B in CeB6 single crystal below 4.2 K and at 77 K using the spin echo technique. The frequency was fixed mostly at 10.7 MHz and the external magnetic field was parallel to the (110) plane. The spectrum at 4.2 K was explained by taking into account the dipolar fields from ferromagnetic moments on Ce atoms. The spectrum in the [111] direction splits into two lines below $3.55\pm 0.05$ K, which is interpreted tentatively by the occurence of the G-type antiferromagnetic ordering with magnetic moments parallel to the external field and with the maximum component 0.1 $\mu_{\text{B}}$/Ce around 2.4 K. The Knight shift for the [111] direction increases with decreasing temperature from $+0.49\pm 0.06$% at 4.2 K to $+2.02\pm 0.25$% at 1.4 K. The angular dependence of the spectrum at 2.6 K was explained to some extent by assuming the G-type and ferromagnetic components of magnetic moments. However, the spectrum at 1.8 K could not be explained by those components.
INSTITUTE OF PURE AND APPLIED PHYSICSの論文
1981-02-15