Temperature Dependence Of Hyperfine Interactions In Incommensurate Systems

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Magnetism in dense hexagonal iron - PNAS

Curie or Ne´el temperature. The inherent frustration of the triangular lattice might lead one to suspect more complex spin arrangements than the one considered here, such as incommensurate spin waves or non-collinear structures, as in the case of fcc iron (19, 20), or a spin glass. If only nearest-neighbor afm interactions are important,

DISCLAIMER - digital.library.unt.edu

tion of temperature. Except for R = Tm, we find that the zero-temperature frequency is well defined (~Y/Y z 0.03) and roughly scales with the free-ion moments. Our Knight-shift measurements in the single-crystal Tm, Ho and Dy systems show that the hyperfine coupling constants are nearly identical for all these systems.

Wednesday 10 July 2013, Strathblane & Cromdale Halls, 16:30-18:30

incommensurate phase, marked changes occur only in the vicinity of Q = (0 0 1). The results help us to understand the basic magnetic interactions in YbCo 2 Si 2 P.063 Investigating the polarization dependence of the spin resonance in UPd 2 Al 3 by inelastic neutron scattering

Observation of many-body localization of interacting fermions

lowest hyperfine states jF;m Fi¼j9 2;− 9 2i ≡ j↓i and j9 2;− 7 2i ≡ j↑i, at an initial temperature of 0.20(2) T F,whereT F is the Fermi temperature. The atoms were initially prepared in a finite temperature band insulating state (41), with up to 100 atoms per tube in the long and or-thogonallattices.Wethenspliteachlatticesiteby

Magnetization distribution in nanocrystalline Fe0.48 0

The ratio of hyperfine fields and magnetic moments (or magnetization) in many Fe-based ferromagnetic systems is in the range 10.0 15.0 T/ µ B [14 16]. Magnetization data for disordered Fe Al alloys [11, 17], can be compared with the average hyperfine mag-netic field (h.m.f.) obtained from Mössbauer experiments [8, 12, 17]. The ratio is an-

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Such systems with strong hyperfine interactions are found in certain rare-earth metals (for example). The coupled bands differ markedly from the unperturbed bands at small momenta and exhibit forbidden energy gaps. In the absence of quadrupolar terms the k = 0 mode of the upper band is proportional to the hyperfine constant, is temperature

New phase transition in Pr Ca MnO system: evidence for

orbital, magnetic, and dielectric orders depending on the doping, temperature, and external stimulation. In particular, much attention has been devoted to the charge and orbital ordered (CO, OO) phases, i.e., a real-space ordering of charge and orbitals due to the electron-phonon and long-range Coulomb interactions.

New Frontier of Molecular Materials (NFMM)

Anomalous Temperature Dependence of the Hyperfine Field in λ-(STF) 2 FeCl 4 S. Fukuoka 18:35 18:50 oral 8 Paramagnetic State in λ-(BEDT-STF) 2 GaCl 4 T. Minamidate 18:50 21:00 Dinner + Poster 9:00 - 17:00 9:00 9:50 Tutorial 2 Geomatrically frustrated Coulomb systems V. Dobrosavljevic

Wednesday 10 July 2013, Strathblane & Cromdale Halls, 16:30-18:30

fixed values of w and temperature T. The ω dependence of the peak intensity was also studied at several T values. We also measured the ω dependence of the peak intensity of χ (Q,ω) at Q =(1/2, 1/2, 2). From the data, χ (Q,ω) is enhanced by superconductivity. The T dependence of the in-plane TA phonon, which corresponds to the elastic

2009 - ill.eu

Pressure and temperature induced M 3 phonon softening in ReO 3 T. Chatterji, P.G. Freeman, M. Jimenez-Ruiz, R. Mittal and S.L. Chaplot Phys. Rev. B. 79, 184302 (2009). Phonon spectra in CaFe 2 As 2 and Ca 0.6 Na 0.4 Fe 2 As 2: Measurement of pressure and temperature dependence and comparison with ab-initio and shell model calculations

Fe Mossbauer study of new multiferroic AgFeO¨

systems [1, 2]. The lattice of this oxide, having rhombohedral space group R3m at room temperature, consists of Fe3+ hexagonal layers along the ch axis, which are separated by intervening two layers of oxygen and one layer of Ag+ ions with linear coordination. This ferrite exhibits two successive magnetic phase transitions at TN1 ≈ 14 K and

The temperature dependence of the magnetocrystalline

The temperature dependence of the magnetocrystalline anisotropy of chromium: a curve with two extrema V. A. Levdik (Submitted 8 August 1988) Zh. Eksp. Teor. Fiz. 95,1784-1795 (May 1989) The response of the incommensurate modulated magnetic structure in the AF, phase of

THE INVESTIGATIO OF INDIUN HALIDEM S AND GRAPHITE

the temperature of the sample les is raise thas 180°n d t froKo 350°m K (11). A charge density wave distorts the crystal lattice and if the wave vector of the charge density wave is a multiple of a reciprocal lattice vector, it is said to be commensurate. Otherwise, it is incommensurate. The commensurate wave corresponds to an enlarged

Band and Correlated Insulators of Cold Fermions in a

particularly suitable for high-dimensional systems. For example, fermions with weak repulsive interactions can be described by Landau s Fermi liquid theory, where the many-body excitations simply behave like free particles, the so-called Landau quasiparticles, whose effective parameters, like the mass, are renormalized. For weak

Trends in magnetism: nanomagnetism (EASTMAG-2013) : selected

LatticewiththeNext-NearestNeighborInteractions A.K.MurtazaevandM.K. Ramazanov 3 MagneticResponseofPn,xLaCexCu04in Comparisonwith Hole-Doped Cuprates A. Sherman 11 IsingAntiferromagnetwith Nearest-NeighborandNext-Nearest-Neighbor Interactions onaSquareLattice A.K. Murtazaev,M.K.RamazanovandM.K.Badiev 17

Disordered Ultracold Gases - Princeton University

Incommensurate lattices 87Rb BEC Initial expansion driven by interaction energy Note: earliest work by Ertmer, Inguscio, Aspect; some confusion about AL (2005-2006) Bouyer / Aspect, Nature 453, 891 (2008) a=0 via Feshbach Resonance Speckle

Scientific Program - phys.cts.nthu.edu.tw

disorder, founding an unexpected dependence with intervalley scattering. Finally we propose experimental guidelines for the observation of both effects. The authors acknowledge CERCA Programme / Generalitat de Catalunya , the Severo Ochoa Program (MINECO, Grant SEV-2013-0295), the Spanish Ministry of Economy and

Joint JCNS-Workshop and Flipper

3 Dear colleagues, In 2016 the JCNS-Workshop is dedicated to neutron scattering from magnetic systems. It will also host the workshop FLIPPER, Single-crystal Diffraction with Polarized Neutrons.

DWOC. &f ~~~v.0,$ Cc%f. [email protected] Jan. 7-13, 1999, BNL-66434

temperature and doping dependence of the resonance peak indicates that the Cu spin correlations are quite sensitive to the hole pairing. ACKNOWLEDGMENTS While I~ave benefited from interactions with many colleagues, I would especially like to acknowledge fkequent stimulating discussions with V. J. Emery and S. A. Kivel.son.

'@Congress Ampere ; 23rd (Rome, Italy)'

NMR Study of the Normal, Incommensurate and Commensurate Phases of

A Different Facet - Europhysics News

Sep 10, 1978 Magnetic Systems In magnetic systems, competing interactions lead to a diversity of magnetic structures and critical phe­ nomena. In particular, if we deal with magnetic dilute alloys we can distinguish two types of magnetic or­ dering for the low temperature pha­ se: the spin glass phase and the giant moment ferromagnetism In

Observation of many-body localization of interacting fermions

Jul 29, 2015 atoms in each of the two lowest hyperfine states F. 9 9 2 2. Fm = − ≡↓ and 9 7, 2 2 − ≡↑ , at an initial tem-perature of 0.20(2) T. F, where T. F. is the Fermi temperature. The atoms are initially prepared in a finite temperature band insulating state (43) with up to 100 atoms per tube in the long and orthogonal lattices. We

Contents

5.4.3.3 Surface-State-Mediated Interactions 616 5.5 Topics of Current Interest: Reduction of Dimensionality and Electron Correlation 618 5.5.1 Electron Interaction and Correlation 619 5.5.2 Screening, Plasmons, and Quasiparticles 620 5.5.3 Model Systems on Surfaces 626 5.5.3.1 Semiconducting Substrates 629

SFB MEETING DECEMBER 13TH T ABSTRACTS

its lack of dependence on pressure. Once the particle has been loaded, its center of mass motion can be controlled and cooled by means of cold damping. We make use of an extra electrode mounted in a vacuum chamber in order to provide a friction force that is capable of damping the center of mass motion to an effective temperature of 2K,

SESSION 10 - Pennsylvania State University

temperature, indicating a possibility of the existence of the spin/charge stripe correlations in the overdoped region in the LSCO system. Keywords: µSR, spin dynamics, La-123, substitution effect, stripe. References [1] I. Watanabe et al., Hyperfine Interactions 86, 603 (1994). [2] I. Watanabe etal., Phys. Rev. B60, R9955 (1999).

LIST OF PUBLICATIONS Prof. Israel Felner December 2016 1. L

High Temperature X-Ray Study of Rare-Earth Silicides, A Commensurate-Incommensurate Modulated Magnetic Structure Magnetism and Hyperfine Interactions of 57Fe

Frontiers in Magnetic Materials - Toc

Frontiers in Magnetic Materials Bearbeitet von Anant V Narlikar 1. Auflage 2005. Buch. xxiv, 800 S. Hardcover ISBN 978 3 540 24512 4 Format (B x L): 15,5 x 23,5 cm

Magnetism in Dense Hexagonal Iron

Spin-phonon interactions have been found to have a strong effect on Raman scattering in a number of systems, including cupric oxide (29) and the copper-ruthenium oxide RuSr2GdCu208 (30). The general character of the effect of spin-phonon interaction on the Raman spectra in these mate-rials is consistent with the observations for hcp iron: broad

Gapless Spin Excitations in the Field-Induced Quantum Spin

Nov 06, 2019 incommensurate or large-unit-cell ordered phases that are possible in a field [52]. Further, a Curie-Weiss (CW) fit to the high-temperature part of the data holds down to 2 K at fields of 8 T, with the CW temperature θ ≈−45 K [inset, Fig. 3(c)], supporting the absence of magnetic order. Because the NMR spectra show no evidence that the

Magneto-structural coupling and harmonic lattice dynamics in

temperature dependence of the Lamb M¨ossbauer factor shows that the paramagnetic phase and the antiferromagnetic phase exhibit similar lattice dynamics in high-frequency modes with very close Debye temperatures, D ∼270 K. 1. Introduction The discovery of superconductivity (SC) with critical temperature (T

Debye temperature of single-crystal Cr with incommensurate

Fig. 5 Dependence of the average hyperfine field, , on temperature, T, as determined for the studied samples. Dash lines are the guides to the eye. In summary, the values of the Debye temperature, T D, have been determined for single-crystals of a pure Cr, whose magnetic structure is constituted by

Signatures of Many-Body Localization in a Controlled Open

to current numerical studies, we also find a strong dependence on interactions. Our work provides a basis for systematic studies of MBL in open systems and opens a route towards extrapolation of closed-system properties from experiments. DOI: 10.1103/PhysRevX.7.011034 Subject Areas: Atomic and Molecular Physics, Condensed Matter Physics I

Minicurso de Supercondutividade Experimental

Hyperfine Interactions in Metals Temperature Dependence In(2) has large hyperfine field, and is incommensurate antiferromagnet! Magnetic neutron diffraction

SIS

incommensurate to crystal lattice (much larger) Herlach et al. Hyperfine Interactions 63, 41 A useful equation for the gap temperature dependence