Ga-NMR study of pyrochlore slab antiferromagnets Ba2Sn2Ga10−7ZnCr7O22

Abstract We have performed 71 Ga-NMR measurements for pyrochlore slab antiferromagnets Ba 2 Sn 2 Ga 10−7 p ZnCr 7 p O 22 ( p =0.93,1). The value of the full width of the spectrum at half maximum is approximately in proportion to the susceptibility. In contrast, the shift decrease below about 30 K while the susceptibility increases like Curie law. These features are common to this type of pyrochlore slab antiferromagnets.