Chung, S. H.Shinde, S. R.Ogale, S. B.Venkatesan, T.Greene, R. L.Dreyer, M.Gomez, R. D.A commercial atomic force microscope/magnetic force microscope ~MFM! was modified to cool magnetic samples down to around 100 K under a high vacuum while maintaining its routine imaging functionality. MFM images of a 120 nm thick La0.7Ca0.3MnO3 film on a LaAlO3 substrate at low temperature show the paramagnetic-to-ferromagnetic phase transition. Evolution of magnetic domains and magnetic ripples with decreasing temperature are also observed near the edge of a 20 nm thick patterned Co film on a Si substrate.en-USatomic forcemagnetic forcemicroscopeArticle