This is the accepted manuscript made available via CHORUS. The article has been published as: Effect of negative chemical pressure on the prototypical itinerant magnet MnSi C. Dhital, M. A. Khan, M. Saghayezhian, W. A. Phelan, D. P. Young, R. Y. Jin, and J. F. DiTusa Phys. Rev. B 95, 024407 — Published 9 January 2017 DOI: 10.1103/PhysRevB.95.024407