Magnetocrystalline anisotropy of Ho1-xErxCo3+yNi2 interpreted on a crystal-field-with-exchange-field model

1988 ◽  
Vol 74 (2) ◽  
pp. 149-152
Author(s):  
Z. Drzazga
Keyword(s):  
Crystal Field ◽  
Field Model ◽  
Magnetocrystalline Anisotropy ◽  
Exchange Field

Spin Reorientations in (ErxY1-x)2Fe14B and (ErxPr1-x)2Fe14B Systems

1987 ◽  
Vol 96 ◽  
Author(s):  
E. B. Boltich ◽  
A. T. Pedziwiatr ◽  
W. E. Wallace
Keyword(s):  
Magnetic Properties ◽  
Crystal Field ◽  
Field Model ◽  
Magnetic Behavior ◽  
Theoretical Description ◽  
Adjustable Parameter ◽  
Spin Reorientation ◽  
Exchange Field ◽  
Field Problem ◽  
Curie Temperatures

ABSTRACTThe bulk magnetic properties of (ErxY1-x)2Fe14B and (ErxPr1-x)2Fe14B systems were studied over the temperature range 4.2-1100 K. Lattice parameters, saturation magnetizations, Curie temperatures and spin reorientation temperatures were determined. Theoretical description of the detailed magnetic behavior is presented, based on a crystal field model. The (ErxY1-x)2Fe14B compounds were all found to exhibit plane-to-axis spin reorientations similar to that observed for Er2Fe14B, with the transition temperature decreasing with increasing Y content. In contrast, the spin reorientations in the (ErxPr1-x)2Fe14B systems appear to be of the cone-to-axis type. Since higher order crystal field terms appear to be significant only in the cases of Nd3+ and Ho3+, the results are discussed in terms of a crystal field Hamiltonian involving only 2nd order terms. Using known values of the exchange field, Fe anisotropy and the ratios of the crystal field coefficients, the multi-ion cr 6.tal field problem was formulated in terms of a single adjustable parameter (B02(f). It is shown that 2nd order crystal field terms are capable, not only of explaining the conical anisotropy of the (ErxPr1-x)2Fe14B systems, but also the decrease in the Er moment upon passing through the spin reorientation (as has been observed for Er2Fe14B). The magnetic structure of Er1.5Pr0.5Fe14B is also predicted.

Magnetocrystalline anisotropy of SmCo5and its interpretation on a crystal-field model

1975 ◽  
Vol 11 (1) ◽  
pp. 435-439 ◽  
Author(s):  
S. G. Sankar ◽  
V. U. S. Rao ◽  
E. Segal ◽  
W. E. Wallace ◽  
W. G. D. Frederick ◽  
...  
Keyword(s):  
Crystal Field ◽  
Field Model ◽  
Magnetocrystalline Anisotropy

Crystal field effects on the magnetocrystalline anisotropy in HoAl2

1976 ◽  
Vol 18 (3) ◽  
pp. 303-306 ◽  
Author(s):  
S.G. Sankar ◽  
S.K. Malik ◽  
V.U.S. Rao
Keyword(s):  
Crystal Field ◽  
Magnetocrystalline Anisotropy ◽  
Field Effects

Simulation of f-d transition using the extended crystal-field model: parameter dependent study for Er3+ in various hosts

2010 ◽  
Vol 28 ◽  
pp. 258-261 ◽  
Author(s):  
Changkui DUAN ◽  
You ZHANG ◽  
Chonggeng MA ◽  
Guoya XIE ◽  
Liusen HU
Keyword(s):  
Crystal Field ◽  
Field Model ◽  
Model Parameter ◽  
Parameter Dependent

Refined crystal field model for the piezospectroscopy analysis of stresses in polycrystalline alumina

2015 ◽  
Vol 118 (9) ◽  
pp. 094503 ◽  
Author(s):  
Samuel Margueron ◽  
David R. Clarke
Keyword(s):  
Crystal Field ◽  
Field Model ◽  
Polycrystalline Alumina

Differences in the low temperature magnetic anisotropy of Nd2Fe14B and Pr2Fe14B interpreted on a crystal field model

1985 ◽  
Vol 55 (6) ◽  
pp. 529-532 ◽  
Author(s):  
E.B. Boltich ◽  
W.E. Wallace
Keyword(s):  
Low Temperature ◽  
Magnetic Anisotropy ◽  
Crystal Field ◽  
Field Model

Comment on “Crystal Field Model of the Magnetic Properties of URu2Si2”

1995 ◽  
Vol 74 (20) ◽  
pp. 4097-4097 ◽  
Author(s):  
M. B. Walker ◽  
W. J. L. Buyers
Keyword(s):  
Magnetic Properties ◽  
Crystal Field ◽  
Field Model

INFLUENCE OF CRYSTAL FIELD EXCITATIONS COUPLED TO LATTICE VIBRATIONS ON THERMODYNAMICAL PROPERTIES OF A TWO-LEVEL PARAMAGNET

2004 ◽  
Vol 18 (03) ◽  
pp. 337-348
Author(s):  
J. ULNER ◽  
J. PEISERT ◽  
K. DURCZEWSKI
Keyword(s):  
Green Function ◽  
Specific Heat ◽  
Crystal Field ◽  
Field Model ◽  
Lattice Vibrations ◽  
Coupling Constant ◽  
Phonon Field ◽  
Thermodynamical Properties ◽  
Weakly Coupled ◽  
Perturbative Method

A two-level crystal field model in the presence of the phonon field is considered. Spins are arranged on a lattice and weakly coupled to the lattice oscillations of small amplitudes. The anticommutator Green function perturbative method up to the second order in the coupling constant is applied to find thermodynamical quantities. The magnetic spectral function, describing the crystal field excitations, influences these quantities. The effect is studied numerically and illustrated in figures. In particular, the influence of the coupling on the Schottky specific heat is shown.

Phase transition in spin-crossover compounds in the breathing crystal field model

2014 ◽  
Vol 89 (22) ◽  
Author(s):  
Iurii Gudyma ◽  
Artur Maksymov ◽  
Cristian Enachescu
Keyword(s):  
Phase Transition ◽  
Crystal Field ◽  
Spin Crossover ◽  
Field Model
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