Temperature Dependence of Ferromagnetic Anisotropy

Carr, W. J.

doi:10.1063/1.1723171

Cited by 48 publications

(25 citation statements)

References 8 publications

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“…where K (n) is the anisotropy expectation value for the n th power angular function [21,22], in the case of uniaxial anisotropy n = 2 and of cubic anisotropy n = 4, leading to an exponent of 3 and 10, respectively. To check whether this model can describe our temperature dependence, we also show in 10 .…”

Section: Resultsmentioning

confidence: 99%

Temperature-dependent magnetic anisotropy in the layered magnetic semiconductors CrI3 and CrBr3

Richter

Weber

Martin

et al. 2018

Phys. Rev. Materials

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Chromium trihalides are layered and exfoliable semiconductors and exhibit unusual magnetic properties with a surprising temperature dependence of the magnetization. By analyzing the evolution of the magnetocrystalline anisotropy with temperature in chromium iodide CrI 3 , we find it strongly changes from K u = 300 ± 50 kJ/m 3 at 5 K to K u = 43 ± 7 kJ/m 3 at 60 K, close to the Curie temperature. We draw a direct comparison to CrBr 3 , which serves as a reference, and where we find results consistent with literature. In particular, we show that the anisotropy change in the iodide compound is more than 3 times larger than in the bromide. We analyze this temperature dependence using a classical model, showing that the anisotropy constant scales with the magnetization at any given temperature below the Curie temperature, indicating that the temperature dependence can be explained by a dominant uniaxial anisotropy where this scaling results from local spin clusters having thermally induced magnetization directions that deviate from the overall magnetization.

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Section: Resultsmentioning

confidence: 99%

Temperature-dependent magnetic anisotropy in the layered magnetic semiconductors CrI3 and CrBr3

Richter

Weber

Martin

et al. 2018

Phys. Rev. Materials

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“…At the temperatures very close to the Curie point, crystal anisotropy of specimen becomes very small and thickness of Bloch wall becomes larger and larger until the meaning of domain conception is lost, whereas the shape anisotropy does not decrease so rapidly compared with the crystal anisotropy, because the shape anisotropy energy is proportional to I2 and crystal energy, according to Zener-Carr's theory, is proportional to the higher power than I2 (Zener, 1954: Carr, 1958 …”

Section: Introductionmentioning

confidence: 99%

Magnetic Viscosity of Magnetite

Shimizu

1960

J. geomagn. geoelec

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Magnetic viscosity of ensemble of medium-sized grains of natural magnetites was examined at various temperatures.It was found that magnetic viscosity coefficient S, defined as I-I0=S(Q+logt) where I and I0 are intensity of magnetization at time t and t=0, is proportional to external magnetic field, and S is a linear function of temperature, except at temperatures close to the Curie point seems also that S tends to a finite value according as grain size tends to the order of a single domain.Further, the half life time for sedimentary rocks, in which directions of grain magnetization are scattered, with reduction factor w, is about 1010 years for w=1/5.These results may show that remanent magnetization of igneous and sedimentary rocks have been stable against thermal viscosity during a geologically long time.

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“…Here, M(0) and K(0) are the values of the magnetization and magnetic anisotropy constant, respectively, at K. The magnetic anisotropy constants and are found to decrease with the increasing . Interestingly, the change of the magnetic anisotropy constants with do not follow the theoretical prediction by Zener and Carr [8], [9], which is (T)/ (0) [M(T)/M(0)] . Based on the data given in Fig.…”

Section: Resultsmentioning

confidence: 46%

Unexpectedly Large Magnetic Anisotropy of Fe$_{3}$Pt Alloy Thin Films With Various Crystallographycal Orientations

Yamamoto

Suzuki

2008

IEEE Trans. Magn.

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The magnetic anisotropy constants of Fe 3 Pt alloy thin films fabricated by e-beam evaporation onto MgO (100), (111), and (110) substrates held at various deposition temperatures were investigated in conjunction with structure. It is observed that the orientation of the Fe 3 Pt alloy thin films depends on the substrate. The magnetic anisotropy constants of each oriented Fe 3 Pt alloy thin films are found to be structure sensitive. The temperature dependence of the magnetic anisotropy constants and magnetization of the Fe 3 Pt alloy thin films were examined. The dependence for Fe 3 Pt alloy thin films between the magnetic anisotropy constants and magnetization is consistent with the theoretical prediction of M 2 for the two-ion model put forward for the case of the Fe 50 Pt 50 alloy.

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Temperature Dependence of Ferromagnetic Anisotropy

Cited by 48 publications

References 8 publications

Temperature-dependent magnetic anisotropy in the layered magnetic semiconductors CrI3 and CrBr3

Temperature-dependent magnetic anisotropy in the layered magnetic semiconductors CrI3 and CrBr3

Magnetic Viscosity of Magnetite

Unexpectedly Large Magnetic Anisotropy of Fe$_{3}$Pt Alloy Thin Films With Various Crystallographycal Orientations

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