[16p-D419-1~18] 10.2 スピン基盤技術・萌芽的デバイス技術

▼ [16p-D419-9] Microwave spectroscopy for field dispersions in MnCO₃

〇Takahiko Makiuchi¹、Takashi Kikkawa¹、Thanaporn Sichanugrist¹、Junki Numata¹、Saburo Takahashi²、Eiji Saitoh^1,2,3,4 (1.Univ. Tokyo、2.AIMR Tohoku Univ.、3.BAI Univ. Tokyo、4.JAEA)

キーワード：spintronics, nuclear spintronics, microwave spectroscopy

Antiferromagnetic electron and nuclear spins are expected to expand the realm of spintronics due to their small stray field, wide dynamic frequency range, and small damping. We report direct observations of magnetic field dispersions in MnCO₃, a canted antiferromagnetic insulator with a large hyperfine interaction. The observed field dispersions clearly exhibit the field-dependent electron-nuclear spin hybridization in MnCO₃. The hybridized nuclear spin branch enters a nonlinear regime at large microwave powers, consistent with the formation of nuclear spin waves due to the Suhl-Nakamura interaction. This method provides a convenient way to explore potential materials for antiferromagnetic and nuclear spintronics.