2009/02/21 by Hiroyuki Yoshida, Yoshihiko Okamoto, Takashi Tayama +8 · 4 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Crystallite #Lattice (music) #Magnetization #Organic and Molecular Conductors Research #Relaxation (psychology) #Specific heat #Spin (aerodynamics) #Spins #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1143/jpsj.78.043704
published as J. Phys. Soc. Jpn. 78 (2009) 043704. · J. Phys. Soc. Jpn, Vol.78, No.4 (2009), in press
arxiv created 2009/02/21 · openalex publication_date 2009/03/25 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Magnetic properties of the spin-1/2 kagome-like compound volborthite are studied using a high-quality polycrystalline sample. It is evidenced from magnetization and specific heat measurements that the spins on the kagome lattice still fluctuate at low temperature, down to T = 60 mK that corresponds to 1/1500 of the nearest-neighbor antiferromagnetic interaction, exhibiting neither a conventional long-range order nor a spin gap. In contrast, 51V NMR experiments revealed a sharp peak at 1 K in relaxation rate, which indicates that a certain exotic order occurs. Surprisingly, we have observed three "steps" in magnetization as a function of magnetic field, suggesting that at least four liquid-like or other quantum states exist under magnetic fields.