Bose–Einstein condensation of ¹⁶²Dy and ¹⁶⁰Dy

We report Bose–Einstein condensation of two isotopes of the highly magnetic element dysprosium: ¹⁶²Dy and ${}^{160}$ Dy. For ¹⁶²Dy, condensates with 10⁵ atoms form below T = 50 nK. We find the evaporation efficiency for the isotope ¹⁶⁰Dy to be poor; however, by utilizing a low-field Fano–Feshbach resonance to carefully change the scattering properties, it is possible to produce a Bose–Einstein condensate of ¹⁶⁰Dy with 10³ atoms. The ¹⁶²Dy BEC reported is an order of magnitude larger in atom number than that of the previously reported ¹⁶⁴Dy BEC, and it may be produced within 18 s. (paper)