Spin Current Generation Controlled by the Néel State in a Compensated Ferrimagnet
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866917233819648000 |
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| author | Lee, Xin Theng Misawa, Takahiro Matsuo, Mamoru Kato, Takeo |
| author_facet | Lee, Xin Theng Misawa, Takahiro Matsuo, Mamoru Kato, Takeo |
| contents | Compensated ferrimagnets, which break sublattice and time-reversal symmetries in the ground state, exhibit an isotropic ferromagnet-like spin splitting despite a vanishing net magnetization, in contrast to altermagnets with momentum-dependent spin splitting. We investigate how isotropic spin splitting manifests in spin transport by analyzing the spin Seebeck effect and spin pumping in a junction between a compensated ferrimagnet and a normal metal. We show that compensated ferrimagnets generate a sizable spin Seebeck signal, with a sign that can be reversed by switching between the two Néel states. Furthermore, we demonstrate that spin pumping exhibits a Néel-state-dependent resonance splitting, which is absent in conventional antiferromagnets. These results identify spin pumping as a natural readout mechanism for compensated ferrimagnets and establish them as promising magnetization-free building blocks for spintronic memory devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_05618 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spin Current Generation Controlled by the Néel State in a Compensated Ferrimagnet Lee, Xin Theng Misawa, Takahiro Matsuo, Mamoru Kato, Takeo Mesoscale and Nanoscale Physics Compensated ferrimagnets, which break sublattice and time-reversal symmetries in the ground state, exhibit an isotropic ferromagnet-like spin splitting despite a vanishing net magnetization, in contrast to altermagnets with momentum-dependent spin splitting. We investigate how isotropic spin splitting manifests in spin transport by analyzing the spin Seebeck effect and spin pumping in a junction between a compensated ferrimagnet and a normal metal. We show that compensated ferrimagnets generate a sizable spin Seebeck signal, with a sign that can be reversed by switching between the two Néel states. Furthermore, we demonstrate that spin pumping exhibits a Néel-state-dependent resonance splitting, which is absent in conventional antiferromagnets. These results identify spin pumping as a natural readout mechanism for compensated ferrimagnets and establish them as promising magnetization-free building blocks for spintronic memory devices. |
| title | Spin Current Generation Controlled by the Néel State in a Compensated Ferrimagnet |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2507.05618 |