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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.03664 |
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| _version_ | 1866908704118407168 |
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| author | Maksimov, Pavel A. Gubkin, Andrey F. Ushakov, Alexey V. Kolesnikov, Alexander I. Cook, Matthew S. McGuire, Michael A. Redhammer, Günther J. Podlesnyak, Andrey Streltsov, Sergey V. |
| author_facet | Maksimov, Pavel A. Gubkin, Andrey F. Ushakov, Alexey V. Kolesnikov, Alexander I. Cook, Matthew S. McGuire, Michael A. Redhammer, Günther J. Podlesnyak, Andrey Streltsov, Sergey V. |
| contents | We present thermodynamic and spectroscopic measurements for an orthopyroxene CoGeO$_3$ with magnetic Co$^{2+}$ ions that form quasi-one-dimensional ladders. We show that non-collinear magnetic order below $T_N$=32 K can be stabilized by a strong local easy-axis anisotropy of $j_\text{eff}=1/2$ moments, which is induced by ligand octahedra distortions. Extraction of a magnetic Hamiltonian from inelastic neutron scattering measurements supports this interpretation and allows us to establish an effective magnetic model. The resulting exchange Hamiltonian justifies CoGeO$_3$ as a realization of an Ising spin ladder compound. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_03664 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ising spin ladders of orthopyroxene CoGeO$_3$ Maksimov, Pavel A. Gubkin, Andrey F. Ushakov, Alexey V. Kolesnikov, Alexander I. Cook, Matthew S. McGuire, Michael A. Redhammer, Günther J. Podlesnyak, Andrey Streltsov, Sergey V. Strongly Correlated Electrons We present thermodynamic and spectroscopic measurements for an orthopyroxene CoGeO$_3$ with magnetic Co$^{2+}$ ions that form quasi-one-dimensional ladders. We show that non-collinear magnetic order below $T_N$=32 K can be stabilized by a strong local easy-axis anisotropy of $j_\text{eff}=1/2$ moments, which is induced by ligand octahedra distortions. Extraction of a magnetic Hamiltonian from inelastic neutron scattering measurements supports this interpretation and allows us to establish an effective magnetic model. The resulting exchange Hamiltonian justifies CoGeO$_3$ as a realization of an Ising spin ladder compound. |
| title | Ising spin ladders of orthopyroxene CoGeO$_3$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2508.03664 |