Magnetic Hysteresis in ErFeO$_3$ Near the Low Temperature Erbium Ordering Transition

Magnetic hysteresis of ErFeO
₃
is investigated in the temperature interval between the compensation point
T

_comp
= 46 K and erbium ordering transition at
T

₁₂
= 4.1 K. The shape of the hysteresis loops evolves from rectangular near the compensation point to a double-triangle loops (similar to perminvar loops) near the erbium ordering transition. The evolution of the loop shape explains the peculiar temperature hysteresis observed at constant applied field.