Neutron diffraction study of Ce 2 RhSi 3 , Nd 2 RhSi 3 and Tb 2 RhSi 3

Metastable magnetic behavior in geometrically frustrated compound CePdAl

“…Clearly, the CePdAl sample shows the spinglass-like AC susceptibility behavior. Note that similar metastable magnetic behavior has been observed in some other AF ordered systems [7], in particular, in the isosturatural compounds TbPdAl [5] and PrNiAl [6].…”

“…Moreover, neutron diffraction measurements [4] suggest that the AF structure in CePdAl is incommensurate, one-third frustrated Ce moments coexist with two-third magnetically ordered moments below T N . We are interested in the possible metastable magnetic behavior in such a geometrically frustrated system motivated by the history-dependent magnetic properties found for isostructural compounds TbPdAl [5] and PrNiAl [6] as well as some other long-range AF-ordered system [7]. In this paper, we present the results of AC susceptibility w ac ðTÞ, field-cooled (FC) and zero-field-cooled (ZFC) DC magnetization MðTÞ and magnetic relaxation MðtÞ measurements on a polycrystalline CePdAl sample.…”

Magnetic ordering in ternary germanide Nd2CuGe6

“…It is interesting to note that metastable magnetic behavior and long time magnetic relaxation effect are also the characteristic features of spin-glass materials [6] (explained as the existence of highly degenerate ground state), ferromagnets with strong magnetic anisotropy [5,7] (explained as the domain-wall pinning effect) and some long-range AF ordered systems [8,9] (may be originated from different mechanism for different material, e.g., for some antiferromagnets with frustrated magnetic moments, spin frustration may be one of the possible origin resemblance to a spin glass). In order to explore the possible spin-glass effect, AC susceptibility measurement on the Nd 2 CuGe 6 sample was also performed at different frequencies.…”

Antiferromagnetic order and Kondo-lattice behavior in single-crystallineCe2RhSi3

“…[16][17][18] The series of ternary rare-earth silicides RE 2 RhSi 3 was reported to crystallize with fully ordered hexagonal unit cells with both lattice parameters doubled with respect to the AlB 2 type. [19][20][21] Magnetic measurements revealed that these compounds order antiferromagnetically for RE= Gd, Tb, Dy, Ho, and Er and ferromagnetically for RE= Nd. 19 Moreover, the neutron-diffraction data confirmed collinear antiferromagnetic ordering for Tb 2 RhSi 3 , Ho 2 RhSi 3 , and Er 2 RhSi 3 , while indicated a ferromagnetic spiral for Nd 2 RhSi 3 .…”