Cooperative Ordering of Gapped and Gapless Spin Networks inCu2Fe2Ge4O13

2004/04/20 by Takatsugu Masuda, T. Masuda, A. Zheludev +5 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.93.077202

4 pages, 4 figures

arxiv created 2004/04/20 · openalex publication_date 2004/08/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The unusual magnetic properties of a novel low-dimensional quantum ferrimagnet Cu₂Fe₂Ge₄O₁₃ are studied using bulk methods, neutron diffraction, and inelastic neutron scattering. It is shown that this material can be described in terms of two low-dimensional quantum spin subsystems, one gapped and the other gapless, characterized by two distinct energy scales. Long-range magnetic ordering observed at low temperatures is a cooperative phenomenon caused by weak coupling of these two spin networks.

Cited by

• Magnetic excitations in the weakly coupled spin dimers and chains materialCu2Fe2Ge4O13