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Magnetization measurements of LaCoO$_{3}$ have been carried out up to 133 Tgenerated with a destructive pulse magnet at a wide temperature range from 2 to120 K. A novel magnetic transition was found at $B>100$ T and $T>T^{*}=32\pm 5$K which is characterized by its transition field increasing with increasingtemperature. At $T<T^{*}$, the previously reported transition at $B\sim65$ Twas observed. Based on the obtained $B$-$T$ phase diagram and theClausius-Clapeyron relation, the entropy of the high-field phase at 80 K isfound to be smaller for about $1.5$ J K$^{-1}$ mol$^{-1}$ than that of thelow-field phase. We suggest that the observed two high-field phases mayoriginate in different spatial orders of the spin states and possibly otherdegrees of freedom such as orbitals. An inherent strong correlation of spinstates among cobalt sites should have triggered the emergence of the orderedphases in LaCoO$_{3}$ at high magnetic fields.

Spin state ordering of strongly correlating LaCoO$_{3}$ induced at ultrahigh magnetic fields