High-field ESR measurements of the diluted pyrochlore slab antiferromagnets Ba2Sn2Ga10−7ZnCr7O22

Abstract Ba 2 Sn 2 Ga 3 ZnCr 7 O 22 is known to be pyrochlore slab antiferromagnets and it exhibits a strong frustration. The pyrochlore slab lattice consists of two 2D-kagome layers which sandwiches a triangular layer in between. In order to investigate the magnetic behaviour, high-field ESR measurements of the diluted Ba 2 Sn 2 Ga 10−7 p ZnCr 7 p O 22 have been performed in the millimeter wave region at the temperatures from 4.2 to 200 K . The concentration dependences of Cr 3+ magnetic ions were observed from p =0.01 to 1.