2015/02/04 by Hiroki Nakano, Toru Sakai
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.mtrl-sci #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.7567/jjap.54.030305
published as Jpn. J. Appl. Phys. 54, 030305 (2015) · 10 pages, 5 figures, to be published in Jpn. J. Appl. Phys
arxiv created 2015/02/04 · openalex publication_date 2015/02/06 · arxiv updated 2015/02/09 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
To clarify the instability of the ferrimagnetism which is the fundamental magnetism of ferrite, numerical-diagonalization study is carried out for the two-dimensional S = 1/2 Heisenberg antiferromagnet with frustration. We find that the ferrimagnetic ground state has the spontaneous magnetization in small frustration; due to a frustrating interaction above a specific strength, the spontaneous magnetization discontinuously vanishes so that the ferrimagnetic state appears only under some magnetic fields. We also find that, when the interaction is increased further, the ferrimagnetism disappears even under magnetic field.