Ising spin ladders of orthopyroxene <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>CoGeO</mml:mi> <mml:mn>3</mml:mn> </mml:msub> </mml:math>
We present thermodynamic and spectroscopic measurements for an orthopyroxene ${\mathrm{CoGeO}}_{3}$ with magnetic ${\mathrm{Co}}^{2+}$ ions that form quasi-one-dimensional ladders. We show that noncollinear 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 ${\mathrm{CoGeO}}_{3}$ as a realization of an Ising spin ladder compound.
Authors
- S. V. Streltsov (ORCID: https://orcid.org/0000-0002-2823-1754)
- Günther J. Redhammer (ORCID: https://orcid.org/0000-0003-0996-3930)
- А. Ф. Губкин (ORCID: https://orcid.org/0000-0002-4280-7561)
- A. Podlesnyak (ORCID: https://orcid.org/0000-0001-9366-6319)
- А. И. Колесников (ORCID: https://orcid.org/0000-0003-1940-4649)
- P. A. Maksimov (ORCID: https://orcid.org/0000-0001-9264-7888)
- Alexey V. Ushakov (ORCID: https://orcid.org/0000-0002-1912-7437)
- Michael A. McGuire (ORCID: https://orcid.org/0000-0003-1762-9406)
- Matthew S. Cook (ORCID: https://orcid.org/0000-0002-8877-7505)
Institutions
- Oak Ridge National Laboratory (US)
- University of Salzburg (AT)
- Joint Institute for Nuclear Research (RU)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-11-21
- DOI
- https://doi.org/10.1103/fxrl-yr9g
- Primary Topic
- Advanced Condensed Matter Physics
- Type
- article
- Field-Weighted Citation Impact
- 0.00