Measurements of crystalline anisotropy on longitudinal media

AbstractUnusual magnetic textures can be stabilized in f-electron materials due to the interplay between competing magnetic interactions, complex Fermi surfaces, and crystalline anisotropy. Here we investigate CeAuSb2, an f-electron incommensurate antiferromagnet hosting both single-Q and double-Q spin textures as a function of magnetic fields (H) applied along the c axis. Experimentally, we map out the field-temperature phase diagram via electrical resistivity and thermal expansion measurements. Supported by calculations of a Kondo lattice model, we attribute the puzzling magnetoresistance enhancement in the double-Q phase to the localization of the electronic wave functions caused by the incommensurate magnetic texture.

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Magnetic crystalline anisotropy of SmNi single crystal

Journal of Magnetism and Magnetic Materials ◽

10.1016/0304-8853(85)90325-7 ◽

1985 ◽

Vol 52 (1-4) ◽

pp. 434-436 ◽

Cited By ~ 8

Author(s):

Y. Isikawa ◽

K. Mori ◽

K. Ueno ◽

K. Sato ◽

K. Maezawa

Keyword(s):

Single Crystal ◽

Crystalline Anisotropy

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Crystal Field Analysis of the Magnetization Curves of HoFe11Ti under High Pressure

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.818.72 ◽

2013 ◽

Vol 818 ◽

pp. 72-76 ◽

Cited By ~ 1

Author(s):

Gang Su

Keyword(s):

High Pressure ◽

Hydrogen Atom ◽

Electric Field ◽

Single Crystals ◽

High Pressures ◽

Field Analysis ◽

Magnetization Curves ◽

Crystalline Electric Field ◽

Crystalline Anisotropy ◽

Magneto Crystalline Anisotropy

The crystalline electric field parameters Anmfor HoFe11Ti under different pressures were evaluated by fitting calculations to the magnetization curves measured on the single crystals at several temperatures. It was found that magneto-crystalline anisotropy has been changed by high pressure and the Anmfor HoFe11Ti under high pressures are strikingly different from Anmfor the corresponding HoFe11Ti H with interstitial hydrogen atom.

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Relativistic Multiple Scattering Theory

MRS Proceedings ◽

10.1557/proc-253-305 ◽

1991 ◽

Vol 253 ◽

Author(s):

B. L. Gyorffy

Keyword(s):

Quantum Mechanics ◽

Degrees Of Freedom ◽

Relativistic Quantum ◽

Schr6dinger Equation ◽

Relativistic Effects ◽

Relativistic Quantum Mechanics ◽

Absolute Minimum ◽

Crystalline Anisotropy ◽

Symmetry Properties ◽

Finite Set

The symmetry properties of the Dirac equation, which describes electrons in relativistic quantum mechanics, is rather different from that of the corresponding Schr6dinger equation. Consequently, even when the velocity of light, c, is much larger than the velocity of an electron Vk, with wave vector, k, relativistic effects may be important. For instance, while the exchange interaction is isotropic in non-relativistic quantum mechanics the coupling between spin and orbital degrees of freedom in relativistic quantum mechanics implies that the band structure of a spin polarized metal depends on the orientation of its magnetization with respect to the crystal axis. As a consequence there is a finite set of degenerate directions for which the total energy of the electrons is an absolute minimum. Evidently, the above effect is the principle mechanism of the magneto crystalline anisotropy [1]. The following session will focus on this and other qualitatively new relativistic effects, such as dichroism at x-ray frequencies [2] or Fano effects in photo-emission from non-polarized solids [3].

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