NQR/NMR study of antiferromagnet CePtIn using single crystals

Sakai, Hironori   ; Tokunaga, Yo  ; Kambe, Shinsaku  ; Lee, H.*; Sidorov, V. A.*; Tobash, P. H.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

We have performed NQR/NMR study for antiferromagnet CePtIn using single crystals. In the paramagnet state, we have observed the NQR lines for In nuclei under zero field, which have been succeeded to be assigned to the crystallographically different sites of In(1), In(2), and In(3). In the antiferromagnetically ordered state, the NQR lines become broadened and split, due to the internal fields on the respective sites. From the spectral analyses, we have found the coexistence of incommensurate and commensurate antiferromagnetic orderings and the stabilization of commensurate antiferromagnetism with applying pressure.