Angular momentum compensation manipulation to room temperature of the ferrimagnet Ho_(3-x)Dy_xFe_5O_(12) detected by the Barnett effect

摘要

We demonstrate that the angular momentum compensation temperature T-A, at which the net angular momentum in the sample disappears, can be controlled in Ho3Fe5O12 by partially substituting Dy for Ho. T-A can be detected using the Barnett effect, by which mechanical rotation magnetizes an object due to spin-rotation coupling. We found that T-A increases with the Dy content and clarified that T-A of Ho1.5Dy1.5Fe5O12 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. Published under license by AIP Publishing.