Dipolar interactions in Fe: A study with the neutron Larmor precession technique MIEZE in a longitudinal field configuration

Säubert, Steffen; Kindervater, J.; Haslbeck, F.; Skoulatos, M.; Böni, P.

doi:10.1103/physrevb.99.184423

Cited by 12 publications

(16 citation statements)

References 39 publications

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“…8. 6,58) With increasing temperature and decreasing momentum the spin wave energy decreases. Further, with increasing momentum the energy of the spin waves increases when going from the zone centre to the boundary of the Brillouin zone.…”

Section: Depolarizing Materialsmentioning

confidence: 99%

“…57) In the following the importance of neutron spin-echo spectroscopy under applied magnetic fields will be illustrated for the case of the skyrmion lattice phase of the B20 compound Ferromagnetic spin waves may be resolved on the background of strong paramagnetic fluctuations (note the linear time scale). 6,58) MnSi. Forming a kind of vortex lines parallel to an applied magnetic field, the skyrmion lattice in MnSi is inherently two dimensional in symmetry.…”

Section: Depolarizing Sample Environments: Magnetic Fieldsmentioning

confidence: 99%

“…The temperature dependence of the spin wave stiffnesses D is in excellent agreement with the literature. 6,58,62) All of these studies underscore the potential of MIEZE as a simple technique for very high-resolution spectroscopy of depolarizing samples and depolarizing sample environments, without the need for the instrumental complexities faced in ferromagnetic spin echo.…”

Section: Depolarizing Materialsmentioning

confidence: 99%

“…8. (Color online) MIEZE signal in the ferromagnetic state of Fe.Ferromagnetic spin waves may be resolved on the background of strong paramagnetic fluctuations (note the linear time scale) 6,58).…”

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confidence: 99%

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MIEZE Neutron Spin-Echo Spectroscopy of Strongly Correlated Electron Systems

et al. 2019

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Recent progress in neutron spin-echo spectroscopy by means of longitudinal Modulation of IntEnsity with Zero Effort (MIEZE) is reviewed. Key technical characteristics are summarized which highlight that the parameter range accessible in momentum and energy, as well as its limitations, are extremely well understood and controlled. Typical experimental data comprising quasi-elastic and inelastic scattering are presented, featuring magneto-elastic coupling and crystal field excitations in Ho 2 Ti 2 O 7 , the skyrmion lattice to paramagnetic transition under applied magnetic field in MnSi, ferromagnetic criticality and spin waves in Fe. In addition bench marking studies of the molecular dynamics in H 2 O are reported. Taken together, the advantages of MIEZE spectroscopy in studies at small and intermediate momentum transfers comprise an exceptionally wide dynamic range of over seven orders of magnitude, the capability to perform straight forward studies on depolarizing samples or under depolarizing sample environments, as well as on incoherently scattering materials.

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Section: Depolarizing Materialsmentioning

confidence: 99%

Section: Depolarizing Sample Environments: Magnetic Fieldsmentioning

confidence: 99%

Section: Depolarizing Materialsmentioning

confidence: 99%

mentioning

confidence: 99%

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MIEZE Neutron Spin-Echo Spectroscopy of Strongly Correlated Electron Systems

et al. 2019

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“…Even though paramagnetic (Murani & Mezei, 1980), ferromagnetic (Mezei et al, 2003) and intensity-modulated NSE (Farago & Mezei, 1986) techniques have been developed, either they cannot be applied due to the depolarizing sample environment or they are too complicated to be routinely operated. All of these difficulties prohibit conventional NSE from accessing the full arena of magnetic phenomena, for example, the spin dynamics in ferromagnetic superconductors (Haslbeck et al, 2019), the spin-wave fluctuations in ferromagnets (Sa ¨ubert et al, 2019) and the paramagnetic-to-skyrmion lattice transition in transition metal helimagnets (Kindervater et al, 2019).…”

Section: Mieze and Its Larmor Phase Aberrationmentioning

confidence: 99%

The linear phase correction of modulation of intensity emerging from zero effort (MIEZE) with magnetic Wollaston prisms

2022

J Appl Cryst

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This study proposes the use of two magnetic Wollaston prisms (MWPs) to correct for the linear Larmor phase aberration of modulation of intensity emerging from zero effort (MIEZE), introduced by the transverse size of the sample. With this approach, the contrast of the intensity modulation can be maximized at any scattering angle of interest such that the same contrast as the direct transmission geometry can be fully recovered. The optimum magnetic fields required for the MWPs depend only on the scattering angle and the frequencies of the radio-frequency flippers, and they are independent of the neutron wavelength and beam divergence, which makes the approach suitable for both pulsed and continuous neutron sources.

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Neutron Spin‐Echo Instrumentation for Magnetic Scattering

Keller

Trepka

Habicht

et al. 2021

Physica Status Solidi (b)

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Neutron spin‐echo (NSE) spectroscopy is a powerful tool for the study of magnon lifetimes and magnetic critical dynamics. The unique property of NSE is the energy resolution in the μeV range. The first NSE spectrometers were optimized for quasielastic scattering at small momentum transfers and delivered substantial contributions to the understanding of critical dynamics in ferromagnets and dynamic correlations in spin glasses. The subsequent resonant NSE (NRSE) technique extends the parameter range toward large momentum and energy transfers and permits to measure magnon lifetimes across the Brillouin zone. NRSE also comprises the Larmor diffraction (LD) mode with a resolution for lattice spacings and their variance Δdhkl/dhkl of order 10−6. LD proves useful to determine magnetostriction effects, small lattice distortions related to magnetic ordering, mosaic spread in crystals, and the size distribution of antiferromagnetic domains. Both typical experiments and the related technical innovation are reviewed and an outlook on future developments is given.

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Dipolar interactions in Fe: A study with the neutron Larmor precession technique MIEZE in a longitudinal field configuration

Cited by 12 publications

References 39 publications

MIEZE Neutron Spin-Echo Spectroscopy of Strongly Correlated Electron Systems

MIEZE Neutron Spin-Echo Spectroscopy of Strongly Correlated Electron Systems

The linear phase correction of modulation of intensity emerging from zero effort (MIEZE) with magnetic Wollaston prisms

Neutron Spin‐Echo Instrumentation for Magnetic Scattering

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