Lawes, Gavin JKenzelmann, MichelRogado, Nyrissa SKim, KeehoonJorge, Guillermo ACava, Robert JAharony, AmnonHarris, A. BrooksEntin-Wohlman, OraYildirim, TanerHuang, QingzhenPark, SungilBroholm, C.Ramirez, Arthur P2023-05-232023-05-232004-12-102015-08-13https://repository.upenn.edu/handle/20.500.14332/43184We present thermodynamic and neutron data on Ni3V2O8, a spin-1 system on a kagomé staircase. The extreme degeneracy of the kagomé antiferromagnet is lifted to produce two incommensurate phases at finite T—one amplitude modulated, the other helical—plus a commensurate canted antiferromagnet for T→0. The H−T phase diagram is described by a model of competing first and second neighbor interactions with smaller anisotropic terms. Ni3V2O8 thus provides an elegant example of order from subleading interactions in a highly frustrated system.PhysicsQuantum PhysicsArticle