Revealing the degree of magnetic frustration by non-magnetic impurities

2010/10/31 by C-C Chen, C. -C. Chen, R. Applegate +7 · 9 citations
Materials Science · Physics and Astronomy · #Anderson impurity model #Condensed matter physics #Ferromagnetism #Frustration #Impurity #Iron-based superconductors research #Magnetic impurity #Magnetic moment #Magnetism #Magnon #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con

paper · pdf · open access · doi:10.1088/1367-2630/13/4/043025

published in New Journal of Physics 13(4), 043025 (IOP Publishing) · Original: 4 pages, 4 figures. Replaced: 8 pages, 4 figures, with updated content and references; [chosen in IOP Select]

openalex publication_date 2011/04/19 · arxiv created 2011/04/27 · arxiv updated 2011/04/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Imaging the magnetic fields around a non-magnetic impurity can provide a clear benchmark for quantifying the degree of magnetic frustration. Focusing on the strongly frustrated J₁-J₂ model and the spatially anisotropic J_1a-J_1b-J₂ model, very distinct low energy behaviors reflect different levels of magnetic frustration. In the J₁-J₂ model, bound magnons appear trapped near the impurity in the ground state and strongly reduce the ordered moments for sites proximal to the impurity. In contrast, local moments in the J_1a-J_1b-J₂ model are enhanced on the impurity neighboring sites. These theoretical predictions can be probed by experiments such as nuclear magnetic resonance and scanning tunneling microscopy, and the results can elucidate the role of frustration in antiferromagnets and help narrow the possible models to understand magnetism in the iron pnictdies.

Citations

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