Magnetocrystalline anisotropy and first-order magnetisation processes in (Pr1-xNdx)2Fe14B compounds

Marusi, G.; Mushnikov, N. V.; Pareti, L.; Solzi, M.; Ермаков, А. Е.

doi:10.1088/0953-8984/2/35/007

Cited by 20 publications

(13 citation statements)

References 30 publications

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“…From this the ground state magnetic moments along the c-axis and in the ab-plane are µ z = 1.71µ B /Nd and µ x = 0.46µ B /Nd, respectively. If the anisotropy energy is calculated using the fitted parameters 43 , the easy axis is predicted to correspond to the c-axis, which is in agreement with that observed in the single crystal susceptibility 29 , and corresponds to the direction of the ordered moment below T 0 .…”

Section: Inelastic Neutron Scattering Measurementssupporting

confidence: 79%

Magnetic order inNd2PdSi3investigated using neutron scattering and muon spin relaxation

et al. 2019

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The rare-earth based ternary intermetallic compounds R2T X3 (R = rare-earth, T = transitionmetal, X = Si, Ge, Ga, In) have attracted considerable interest due to a wide range of interesting low temperature properties. Here we investigate the magnetic state of Nd2PdSi3 using neutron diffraction, muon spin relaxation (µSR) and inelastic neutron scattering (INS). This compound appears anomalous among the R2PdSi3 series, since it was proposed to order ferromagnetically, whereas others in this series are antiferromagnets. Our results confirm the onset of long range magnetic order below T0 = 17 K, where the whole sample enters the ordered state. Neutron diffraction measurements establish the presence of a ferromagnetic component in this compound, as well as an antiferromagnetic one with a propagation vector k2 = (1/2, 1/2, 1/4 − δ) (δ ≈ 0.02 − 0.03) with moments orientated exclusively along the c-axis. µSR measurements suggest that these components coexist on a microscopic level, and therefore the magnetic structure of Nd2PdSi3 is predominantly ferromagnetic, with a sinusoidally modulated antiferromagnetic contribution which reaches a maximum amplitude at 11 K, and becomes smaller upon further decreasing the temperature. INS results show the presence of crystalline-electric field (CEF) excitations above T0, and from our analysis we propose a CEF level scheme.

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Section: Inelastic Neutron Scattering Measurementssupporting

confidence: 79%

Magnetic order inNd2PdSi3investigated using neutron scattering and muon spin relaxation

et al. 2019

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“…By considering the magnetocrystalline anisotropy energy (E a ), the moment is predicted to lie along the c axis for a negative B 0 2 and the ψ 1 GS. 36 Therefore our CEF model correctly predicts the direction of the observed magnetic moment. From previous studies of the magnetic susceptibility, a CEF scheme with a GS of |± 1 2 was suggested.…”

Section: Inelastic Neutron Scatteringmentioning

confidence: 55%

Neutron scattering and muon spin relaxation measurements of the noncentrosymmetric antiferromagnetCeCoGe3

et al. 2013

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The magnetic states of the non-centrosymmetric, pressure induced superconductor CeCoGe3 have been studied with magnetic susceptibility, muon spin relaxation (µSR), single crystal neutron diffraction and inelastic neutron scattering (INS). CeCoGe3 exhibits three magnetic phase transitions at TN1 = 21 K, TN2 = 12 K and TN3 = 8 K. The presence of long range magnetic order below TN1 is revealed by the observation of oscillations of the asymmetry in the µSR spectra between 13 K and 20 K and a sharp increase in the muon depolarization rate. Single crystal neutron diffraction measurements reveal magnetic Bragg peaks consistent with propagation vectors of k = (0,0, ) below TN3. An increase in intensity of the (1 1 0) reflection between TN1 and TN3 also indicates a ferromagnetic component in these phases. These measurements are consistent with an equal moment, two-up, two-down magnetic structure below TN3, with a magnetic moment of 0.405(5) µB/Ce. Above TN2, the results are consistent with an equal moment, two-up, one-down structure with a moment of 0.360(6) µB/Ce. INS studies reveal two crystal-field (CEF) excitations at ∼ 19 and ∼ 27 meV. From an analysis with a CEF model, the wave-functions of the J = 5 2 multiplet are evaluated along with a prediction for the magnitude and direction of the ground state magnetic moment. Our model correctly predicts that the moments order along the c axis but the observed magnetic moment of 0.405(5) µB is reduced compared to the predicted moment of 1.01 µB. This is ascribed to hybridization between the localized Ce 3+ f-electrons and the conduction band. This suggests that CeCoGe3 has a degree of hybridization between that of CeRhGe3 and the non-centrosymmetric superconductor CeRhSi3.

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“…The present results (Figs. [3][4][5][6][7][8][9] indicate that the spin reorientation does not deteriorate the magnetic properties. On decreasing the temperature below ambient: (i) j H C for the alloys investigated increases rapidly; (ii) J r and (BH) max increase for Nd-rich alloys but there is no significant change for Pr-rich alloys.…”

Section: Using Nanophase (Nd/pr)-(fe/co)-b Magnets At Low Temperaturementioning

confidence: 99%

“…The effects of substitutions of rare-earth elements or 3d transition metals on the spin reorientation of Nd 2 Fe 14 B-type compounds in single crystal or sintered magnet forms have been examined extensively [1][2][3]. However, nanocrystalline REFeB alloys have received relatively little attention; notably, no detailed study of the effects of mean crystallite size d g on the spin reorientation has been reported previously.…”

Section: Introductionmentioning

confidence: 99%

Sub-ambient magnetic properties of nanophase Nd/Pr–Fe–B based hard magnetic alloys

Liu

Davies

2006

Journal of Alloys and Compounds

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Magnetocrystalline anisotropy and first-order magnetisation processes in (Pr_1-xNd_x)₂Fe₁₄B compounds

Cited by 20 publications

References 30 publications

Magnetic order inNd2PdSi3investigated using neutron scattering and muon spin relaxation

Magnetic order inNd2PdSi3investigated using neutron scattering and muon spin relaxation

Neutron scattering and muon spin relaxation measurements of the noncentrosymmetric antiferromagnetCeCoGe3

Sub-ambient magnetic properties of nanophase Nd/Pr–Fe–B based hard magnetic alloys

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