[15p-PA01-1~58] 10 スピントロニクス・マグネティクス（ポスター）

▲ [15p-PA01-20] Micromagnetic simulation of magnetic nano-particles detected using spin-wave

〇(M2)Shunki Nakamura^1,2、Satoshi Iihama^2,3、Shigemi Mizukami^2,4 (1.Tohoku Univ.、2.AIMR,Tohoku Univ.、3.FRIS,Tohoku Univ.、4.CSIS,Tohoku Univ.)

キーワード：spin-wave sensing

Recently, a magnetic field sensing using spin-wave has been proposed, and a highly sensitive sensor has been demonstrated. Our idea is to extend this spin-wave sensing for virus detection utilizing magnetic nano-particles for potential medical applications. To clarify this feasibility, we investigate an effect of presence of a magnetic nano-particle on spin-wave propagation using numerical simulations. Rf magnetic field was locally applied to a left-end of a spin-wave channel for an excitation, and a propagating spin-wave was detected at the right-end. The x component of magnetization vector M at the right-end was evaluated using a Fast Fourier Transform (FFT) to characterize a transmittance and so on. The spin-wave transmittance T_r is defined as m_x (f) / m_x0 (f) obtained from FFT. Here, m_x (f) and m_x0 (f) are the transmission amplitude of spin-wave in the frequency domain with and without a nano-pillar, respectively. The spin-wave transmittance is significantly reduced when the magnetic nano-pillar is present. We will discuss these results and issues to be addressed in the presentation.