Antiferromagnetic spin pumping via hyperfine interaction

Abstract

Spin pumping is an interfacial spin current generation from the ferromagnetic layer to the non-magnetic metal at its interface. The polarization of the pumped spin current ${\text{J}}_s\propto \text{m}\times \dot{\text{m}}$ depends on the dynamics of the magnetic moment $\text{m}$. When the materials are based on light transition metals, mechanism behind the spin current transfer is dominated by the exchange interaction between spin of localized d-electrons and itinerant conduction electrons. In heavier transition metals, however, the interaction is not limited to the exchange interaction. The spin of the conduction electron can interact to its nuclear spin by means of hyperfine interaction, as observed in the shift of NMR frequency. By studying the spin polarization of conduction electron of the non-magnetic metallic layer due to a nuclear magnetic moment $\text{I}$ of the ferromagnetic layer, we show that the hyperfine interaction can mediate the spin pumping. The polarization of the spin current generation is shown to have a similar form $J_s\propto \text{I}\times \dot{\text{I}}$.

8+ pages, 2 figures. International Conference on Hyperfine Interactions (HYPERFINE 2021)

References in corpus (9)

• Spin pumping and spin-transfer torques in antiferromagnets
• Superfluid spin transport through antiferromagnetic insulators
• On the Gross-Pitaevskii equation for trapped dipolar quantum gases
• Observation of nuclear-spin Seebeck effect
• Crystal field effects on spin pumping
• Detecting quadrupole: a hidden source of magnetic anisotropy for Manganese alloys
• Nanometre-scale nuclear-spin device for quantum information processing
• Voltage control of interface rare-earth magnetic moments
• Yukawa potential for realistic prediction of Hubbard and Hund interaction parameters for transition metals

Cited by in corpus (5)

• Effect of interfacial spin mixing conductance on gyromagnetic ratio of Gd substituted Y${}_3$Fe${}_5$O${}_{12}$
• Enhancement of spin mixing conductance by $s$-$d$ orbital hybridization in heavy metals
• Electrically controllable exchange bias via interface magnetoelectric effect
• Enhancement of thermal spin pumping by orbital angular momentum of rare earth iron garnet
• Spin-orbit torque on nuclear spins exerted by a spin accumulation via hyperfine interactions