Book ChapterDOI
Helical Spin Ordering—1 Theory of Helical Spin Configurations
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In this paper, the theory of helical and modified-helical spin ordering, confining to molecular field treatments and spin-wave calculations, is discussed, and the role of conduction electrons in the exchange interaction is discussed.Abstract:
Publisher Summary This chapter discusses the theory of helical and modified-helical spin ordering, confining to molecular field treatments and spin-wave calculations Modifications of a helical spin order arise from anisotropy energies and an external magnetic field Also, a description of the theory of complex helical spin configurations in complex crystalline lattices is given A basic assumption made is that there exist isotropic exchange interactions between atomic spin moments of further neighbors as well as between neighboring moments The coefficients of these exchange interactions are assumed as given constants In this sense, the spin system dealt with may be called the Heisenberg magnet Experimental observations relevant to the theory are referred to and are useful to elucidate the theory This chapter deals with the role of conduction electrons in the exchange interaction; it reviews and discusses the observed magnetic and other properties of heavy and light rare-earth metals, and finally discusses the spin density wave in chromiumread more
Citations
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Magnetization plateau in the frustrated quantum spin system Cs 2 CuBr 4
TL;DR: The magnetic phase transitions of the frustrated antiferromagnet were investigated by means of magnetization and specific heat measurements in this paper, and the magnetization plateau should be attributed to quantum fluctuation.
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Symmetry, Structure, and Dynamics of Monoaxial Chiral Magnets
TL;DR: The chiral soliton lattice appears under a magnetic field perpendicular to the chiral helical axis and is very robust and stable with phase coherence on a macroscopic length scale as discussed by the authors.
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Unified molecular field theory for collinear and noncollinear Heisenberg antiferromagnets
TL;DR: In this paper, a unified molecular field theory (MFT) is presented that applies to both collinear and planar noncollinear Heisenberg antiferromagnets (AFs) on the same footing.
Journal ArticleDOI
Spin ordering in three-dimensional crystals with strong competing exchange interactions
T. A. Kaplan,N. Menyuk +1 more
TL;DR: In this paper, the authors discuss magnetic ordering in three-dimensional crystals in which Heisenberg exchange interactions appear to dominate, called frustrated spin systems, where strong competing interactions lead to non-collinear structures, often spirals and many variations thereof.
Journal ArticleDOI
Magnetic properties of the CoxNi1−xMnGe system
TL;DR: In this article, the magnetic properties of the Co x Ni 1−x MnGe system have been studied by magnetometric measurements and it was shown that the solid solutions exist for 0 ⩽ χ χ⩽ 1, with the crystal structure of NiTiSi type.
References
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Journal ArticleDOI
Antiferromagnetic Arrangements in Ferrites
TL;DR: In this paper, the antiferromagnetic exchange interactions within the two magnetic sublattices are considered and the ground state may have an antiparallel arrangement of the spins on the two sites.
Journal ArticleDOI
Crystal Distortion in Magnetic Compounds
TL;DR: In this article, an effective Hamiltonian of an interaction between the orbital states of the Jahn-Teller ions through a canonical transformation was obtained, which associates each electronic state with a local lattice distortion, and by use of the mean field approximation.
Journal ArticleDOI
A New Type of Antiferromagnetic Structure in the Rutile Type Crystal
TL;DR: In this article, a screw-type antiferromagnetic spin arrangement, which is theoretically possible in the rutile type crystal and seems to be realized in polianite, was proposed.
Journal ArticleDOI
Phenomenological Discussion of Magnetic Ordering in the Heavy Rare-Earth Metals
TL;DR: The rare earth metals Gd-Tm have similar crystal structures and their magnetic properties have been partially evaluated by a number of techniques as mentioned in this paper, including a crystal field calculation that gives axial and hexagonal anisotropies which vary along the series in a way which accounts for the observed structures.