Angular momentum compensation manipulation to room temperature of the ferrimagnet Ho
Dy
Fe
O
detected by the Barnett effect
Imai, Masaki
; Chudo, Hiroyuki
; Ono, Masao
; Harii, Kazuya; Matsuo, Mamoru; Onuma, Yuichi*; Maekawa, Sadamichi; Saito, Eiji
We demonstrate that the angular momentum compensation temperature
, at which the net angular momentum in the sample disappears, can be controlled in Ho
Fe
O
by partially substituting Dy for Ho. The
can be detected using the Barnett effect, by which mechanical rotation magnetizes an object due to spin-rotation coupling. We found that
increases with the Dy content and clarified that the
of Ho
Dy
Fe
O
coincides with room temperature. The Barnett effect enables us to explore materials applicable to magnetic devices utilizing the angular momentum compensation only by rotating the powder sample at room temperature.