Weak Ferromagnetism in Chiral Inorganic Compound CrSi

We report that a chiral inorganic compound CrSi exhibits weak ferromagnetism.Temperature dependence of magnetization showed that MnSi exhibited a magnetization anomaly, which is a unique imprint from ferromagnetic to chiral helimagnetic transition, and a experimental evidence of chiral magnetic soliton formation.However CrSi never exhibited the anomaly, but did a ferromagnetic response.Field dependence of magnetization of CrSi showed ferromagnetic spontaneous moments up to 0.2 kOe, and linear increase in larger magnetic field.These behaviors can be interpreted as weak ferromagnetic ordering.