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Low-Energy Structure of Heisenberg Ferrimagnetic Spin Chains

Shoji Yamamoto, Tôru Sakai

Static and dynamic structure factors of Heisenberg ferrimagnetic spin chains are numerically investigated. There exist two distinct branches of elementary excitations, which exhibit ferromagnetic and antiferromagnetic aspects. The ferromagnetic feature is smeared out with the increase of temperature, whereas the antiferromagnetic one persists up to higher temperatures. The scattering intensity is remarkably large at lower boundaries of the ferromagnetic and antiferromagnetic spectra. All these observations are consistent with the ferromagnetic-to-antiferromagnetic crossover in the thermal behavior which has recently been reported.Static and dynamic structure factors of Heisenberg ferrimagnetic spin chains are numerically investigated. There exist two distinct branches of elementary excitations, which exhibit ferromagnetic and antiferromagnetic aspects. The ferromagnetic feature is smeared out with the increase of temperature, whereas the antiferromagnetic one persists up to higher temperatures. The scattering intensity is remarkably large at lower boundaries of the ferromagnetic and antiferromagnetic spectra. All these observations are consistent with the ferromagnetic-to-antiferromagnetic crossover in the thermal behavior which has recently been reported.

arXiv:cond-mat/9810113Journal of the Physical Society of JapanNov 1, 199823 citations

Ferromagnetism of the electron gas

John Lam

The European Physical Journal BSep 1, 19721 citation

The Origin of Ferromagnetism

Hal Tasaki

Graduate texts in physicsJan 1, 20202 citations

Ferromagnetism of spinor atomic condensates in the double well

Chengjun Tao, Qiang Gu

We show that the ferromagnetic and antiferromagnetic spinor condensates display distinct dynamical behaviors in double well. For the ferromagnetic case, strong symmetry-breaking dynamics can be induced by a small initial distortion. Contrarily, the σ = ±1 components tend to be well mixed in the antiferromagnetic condensate. The tunneling coupling plays an important role in distinguishing ferromagnetism and antiferromagnetism.

Journal of Physics Conference SeriesDec 17, 20121 citation

On the Landau diamagnetism

N. Angelescu, G. Nenciu, M. Bundaru

Communications in Mathematical PhysicsFeb 1, 197532 citations

Crossover Phase Diagram of 2D Heisenberg Ferro- and Antiferromagnets

Alexander Sokol, N. Elstner, Rajiv R. P. Singh

We propose a single crossover phase diagram applicable to 2D collinear Heisenberg antiferromagnets (AFMs) and ferromagnets (FMs), and show that the scaling regimes of AFMs and FMs are in one-to-one correspondence. The phase diagram is split into classical and quantum regions. Our two key results are: (i) in the classical region, the AFMs and FMs exhibit nearly identical behavior near their respective ordering wavevectors, which we observe for S=1 and higher using series expansions; and (ii) in the quantum region, quantum critical (QC) regime is present not only for the AFMs, but for FMs as well.We propose a single crossover phase diagram applicable to 2D collinear Heisenberg antiferromagnets (AFMs) and ferromagnets (FMs), and show that the scaling regimes of AFMs and FMs are in one-to-one correspondence. The phase diagram is split into classical and quantum regions. Our two key results are: (i) in the classical region, the AFMs and FMs exhibit nearly identical behavior near their respective ordering wavevectors, which we observe for S=1 and higher using series expansions; and (ii) in the quantum region, quantum critical (QC) regime is present not only for the AFMs, but for FMs as well.

arXiv:cond-mat/9505148May 30, 19951 citation

On ferromagnetism and antiferromagnetism

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