Magnetism in 2D Heavy Fermion Superconductor CePt$_{2}$In$_{7}$
ORAL
Abstract
CePt$_{2}$In$_{7}$ was first synthesized in 2008, and it was discovered to be a superconductor under pressure shortly thereafter in 2009. It is closely related to the well-studied crystal class CeMIn$_{5}$ (M = Ir, Co, Rh), but CePt$_{2}$In$_{7}$ is considerably more anisotropic with a c/a ratio more than twice as large as the 115's. We present here nuclear quadrupole resonance results for the $^{115}$In nucleus, and follow it from the paramagnetic heavy fermion state into the anti-ferromagnetic state below T$_{N}$ = 5.2 K. The NQR data will show a rich magnetic phase diagram, with a commensurate magnetic order parameter directly below T$_{N}$, and more complex magnetic states emerging as the material is further cooled. Additionally, we will present some additional results on how hydrostatic pressure affects the magnetic order in CePt$_{2}$In$_{7}$.
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