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Field-induced reentrant magnetoelectric phase in LiNiPO4
2017
Physical review B
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E SE = (J 12 + J 34 ) S 2 1 − 1 2 (φ 2 c + φ 2 ) − (J 34 − J 12 ) S 2 φ c φ, where φ is the field-induced change in canting angle. ...
Assuming the linear change in exchange constants the energy difference now becomes E SE = S 2 − 0.15 − 2δφ c φ − δcos(2φ c ) 2 φ 2 . ...
doi:10.1103/physrevb.95.064421
fatcat:iogl4wm3xnc2je6fb35jifwsdi
Spin exchange Hamiltonian and topological degeneracies in elemental gadolinium
[article]
2021
arXiv
pre-print
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(D1) which give an equivalent e −iQ• for a neutron scattered along (hh0). ...
The neutron structure factor for magnetic correlations is S αβ (Q, ω) = ∞ −∞ S α 0 (0)S β (t) e −iQ• e −iωt dt, (D1) where is a sum over all neighbor distances, Q is the scattering vector, and S β r (t ...
For E i = 100 meV the same chopper speeds were used but with the Fermi 2 chopper at 540 Hz. Appendix B: Fitting procedure ...
arXiv:2107.11370v3
fatcat:ayisya3dsndpnmtw5jgismvrui
Modern Trends in Neutron Scattering Instrument Technologies
2022
Instruments
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However, the pulsed nature of the beam is also essential to support time-of-flight methods critical to using higher energy neutrons (E ∼ 1 eV) that cannot not be effectively monochromated with crystal ...
doi:10.3390/instruments6030022
fatcat:mcwu762o5veqxjqvloohrr5qoq
An NCN-pincer ligand dysprosium single-ion magnet showing magnetic relaxation via the second excited state
2014
Scientific Reports
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Single-molecule magnets are compounds that exhibit magnetic bistability purely of molecular origin. The control of anisotropy and suppression of quantum tunneling to obtain a comprehensive picture of the relaxation pathway manifold, is of utmost importance with the ultimate goal of slowing the relaxation dynamics within single-molecule magnets to facilitate their potential applications. Combined ab initio calculations and detailed magnetization dynamics studies reveal the unprecedented
doi:10.1038/srep05471
pmid:24969218
pmcid:PMC4073120
fatcat:5vdo6gbpunbc5hi55aiccyrp3q
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... n mediated via the second excited state within a new DyNCN system comprising a valence-localized carbon coordinated to a single dysprosium(III) ion. The essentially C 2v symmetry of the Dy III ion results in a new relaxation mechanism, hitherto unknown for mononuclear Dy III complexes, opening new perspectives for means of enhancing the anisotropy contribution to the spin-relaxation barrier.
Charge density wave with anomalous temperature dependence in UPt2Si2
2020
Physical review B
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SF and NSF intensities from PTAX measured at 50 K at (e) Q = (2 0.42 0) and (f) (2 1.58 0), where solid lines are fit to a Gaussian.
. 1(b) and 1(c), the intensities of longitudinal superlattice peaks ...
investigated the origin of these superlattice reflections by performing neutron polarization analysis on the (2 0.42 0) and (2 1.58 0) satellite peaks at 50 K at HB1 triple-axis spectrometer as shown in Figs. 1(e) ...
doi:10.1103/physrevb.102.041112
fatcat:ll2rynm4ojfo3p53nqdhp5mesa
Dirac magnons, nodal lines, and nodal plane in elemental gadolinium
[article]
2021
arXiv
pre-print
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2021 pre-print arXiv:2107.11372v2 fatcat:53amqvdp3ffc7aqszti5oqxvlqOther Versions
ick z e iakx 2 + e 1 2 ia 2k x + √ 3k y + e 1 2 i √ 3ak y × e − 1 6 i 3ck z +3ak x +2 √ 3ak y , (S16) γ 3 = 1 6 1 + e ick z e 2iak x + e ia k x + √ 3k y + 1 × e − 1 6 i 3ck z +6ak x +2 √ 3ak y . ...
For E i = 100 meV we ran the same configuration but Fermi 2 chopper at 540 Hz. ...
arXiv:2107.11372v3
fatcat:cro4zomiwjdwxkmxpr7y744pjy
Recent developments of MCViNE and its applications at SNS
2019
Journal of Physics Communications
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Figure 3 (C) shows a S(Q,E) spectrum obtained from simulation. ...
(B) Energy spectrum obtained from integrating the I(Q, E) spectrum in (A) over Q range of 5-9Å −1 . ...
doi:10.1088/2399-6528/ab3622
fatcat:it6balaj25hulaw3jwofkpatzi
Spin dynamics of the low-dimensional magnet (CH3)2NH2CuCl3
2006
Physica. B, Condensed matter
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Dimethylammonium copper (II) chloride (also known as DMACuCl3 or MCCL) is a low dimensional S=1/2 quantum spin system proposed to be an alternating ferro-antiferromagnetic chain with similar magnitude ferromagnetic (FM) and antiferromagnetic (AFM) exchange interactions. Subsequently, it was shown that the existing bulk measurements could be adequately modeled by considering DMACuCl3 as independent AFM and FM dimer spin pairs. We present here new inelastic neutron scattering measurements of the
doi:10.1016/j.physb.2006.05.145
fatcat:5bk7yattyfgmfdbvjzp6tgoqjy
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... pin-excitations in single crystals of DMACuCl3. These results show significant quasi-one-dimensional coupling, however the magnetic excitations do not propagate along the expected direction. We observe a band of excitations with a gap of 0.95 meV and a bandwidth of 0.82 meV.
Dual Nature of Magnetism in a Uranium Heavy-Fermion System
2018
Physical Review Letters
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While data with E i ¼ 50 meV reveal the 7 meV gap with better resolution, E i ¼ 100 meV data capture the full range of magnetic excitation and, therefore, were used for the global fitting. ...
The measured scattering intensities were converted to the imaginary part of the dynamical magnetic susceptibility via the fluctuationdissipation theorem, χ 00 ðQ;ωÞ ¼ πð1 − e −E=k B T ÞSðQ;ωÞ [20] . ...
doi:10.1103/physrevlett.121.057201
pmid:30118279
fatcat:hf24odgifngofg5awb2xkqpheu
Strongly two-dimensional exchange interactions in the in-plane metallic antiferromagnet Fe_2As probed by inelastic neutron scattering
[article]
2020
arXiv
pre-print
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Karigerasi, Kisung Kang, Garrett E. Granroth, Arnab Banerjee, André Schleife, Daniel P. ...
Data from E i = 30 meV (below dashed lines) has been overlaid on top of data from E i = 70 meV. The corresponding simulated phonon spectra along [0 1 L] is shown in (b). ...
arXiv:2008.05050v1
fatcat:uqgclh45kna75knax6vrgeoxma
Event-based processing of neutron scattering data at the Spallation Neutron Source
2018
Journal of Applied Crystallography
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Cryst. (2018). 51, 616-629 Garrett E. Granroth et al. Event-based processing of neutron data 621
E. Granroth et al. Event-based processing of neutron data J. Appl. ...
Cryst. (2018). 51, 616-629 Garrett E. Granroth et al. Event-based processing of neutron data 623
E. Granroth et al. Event-based processing of neutron data J. Appl. ...
doi:10.1107/s1600576718004727
fatcat:ko5pth26mvgkhodyoytf6lp3ti
Charge density wave with anomalous temperature dependence in UPt2Si2
[article]
2020
arXiv
pre-print
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SF and NSF intensities from PTAX measured at 50 K at (e) Q = (2 0.42 0) and (f) (2 1.58 0), where solid lines are fit to a Gaussian. ...
the origin of these superlattice reflections by performing neutron polarization analysis on the (2 0.42 0) and (2 1.58 0) satellite peaks at 50 K at HB1 triple-axis spectrometer as shown in Fig. 1 (e) ...
arXiv:1908.03160v4
fatcat:5test3cqprattigo3qtuiktupq
Electronic and structural properties of RbCeX_2 (X_2: O_2, S_2, SeS, Se_2, TeSe, Te_2)
[article]
2022
arXiv
pre-print
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E. ...
2 , and E 1 =27.5, E 2 =34.1 meV for RbCeTe 2 . ...
arXiv:2204.12086v2
fatcat:mrtwmusjdfbsjdqmzabvvyqqxu
MCViNE – An object oriented Monte Carlo neutron ray tracing simulation package
2016
Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment
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structure factor S(Q, E) = 1 − γ Q // 2 1 − γ 2 Q // δ(E − E(Q)) (2) where γ Q // = cos(hπ) cos(kπ), 2J = 2.563. ...
In (e), all of the kernels in (d) are used with multiple scattering turned on. Overall the features shown in the experiment data (a) and the simulated data (e) agree very well. ...
doi:10.1016/j.nima.2015.11.118
fatcat:yduqzcsqh5ghhfta522zu6v6gm
Spinon Fermi surface spin liquid in a triangular lattice antiferromagnet NaYbSe_2
[article]
2021
arXiv
pre-print
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2020 pre-print arXiv:2004.06867v3 fatcat:eanqheemznbntbozxworuypbpiOther Versions
The wave vector cuts in (a,b,d-g) were measured in the [H, H, L] zone with E i = 3.32 meV, while those in (c,h,i) were measured in the [H, K, 0] plane with E i = 3.70 meV. ...
To excite the pair with an energy E, a minimal momentum transfer E/v F is needed where v F is the Fermi velocity. The slope of the V-shape is expected to be the Fermi velocity. ...
arXiv:2004.06867v4
fatcat:p5jfhj6uvffvti6w5a45rd7drm
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