@inproceedings{oai:u-fukui.repo.nii.ac.jp:00029022, author = {Higuch, T and Mitsuda, S and Idehara, T and Noda, H and Fujii, Y and Kikuchi, H and Chiba, M}, book = {遠赤外技術に関する国際シンポジウム, Proceedings of 2nd International Workshop on Far Infrared Technologies}, month = {}, note = {Geometrically frustrated antiferromagnets have attracted the great interest in which they exhibit a unique behavior. In the family of geometry frustration antiferromagnets, the kagome lattice in two dimensions and the pyrochlore lattice in three dimensions have attracted special attentions both experimentally and theoretically. Ba2Sn2Ga3+xZnCr7_x022 is known to be pyrochlore slab antiferromagnets and it exhibits a strong frustration. In order to investigate the magnetic behavior, high field ESR measurements of Ba2Sn2Ga3+xZnCr7-x022 have been performed in the millimeter wave region at temperatures from 4.2 K to 200 K. The concentration dependence of Cr3+ ions was observed from x=O to x=5.0. For Ba2Sn2Ga3ZnCr7022 (x=O), the pyrochlore slab is fully filled with Cr3+ ions, the line width of the ESR absorption lines increased and the resonance field shifted as the temperature was decreased. These tendencies were suppressed as the Cr3+ concentration was decreased.}, pages = {214--218}, publisher = {Research Center for Development of Far Infrared Region,Fukui University}, title = {The millimeter ESR measurements of pyrochlore slab antiferromagnets Ba2Sn2Ga3+xZnCr7-x022}, volume = {2002}, year = {2002} }