Spin waves in metallic iron and nickel measured by soft x-ray resonant inelastic scattering

被引:17
作者
Brookes, N. B. [1 ,2 ]
Betto, D. [1 ]
Cao, K. [3 ]
Lu, Yi [4 ]
Kummer, K. [1 ]
Giustino, F. [5 ,6 ,7 ]
机构
[1] European Synchrotron, ESRF, 71 Ave Martyrs, F-38043 Grenoble, France
[2] Diamond Light Source, Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England
[3] Daresbury Lab, Warrington WA4 4AD, Cheshire, England
[4] Heidelberg Univ, Inst Theoret Phys, Philosophenweg 19, D-69120 Heidelberg, Germany
[5] Univ Oxford, Dept Mat, 16 Pk Rd, Oxford OX1 3PH, England
[6] Univ Texas Austin, Oden Inst Computat Engn & Sci, Austin, TX 78712 USA
[7] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA
关键词
MAGNETIC CIRCULAR-DICHROISM; NEUTRON-SCATTERING; ENERGY-BANDS; EXCITATIONS; SUSCEPTIBILITY; FLUCTUATIONS; INTENSITIES; ESRF; FE;
D O I
10.1103/PhysRevB.102.064412
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The spin-wave dispersions in iron and nickel along the [111] direction are determined using soft x-ray resonant inelastic x-ray scattering (RIXS). For iron, a 10-nm thin film was studied and, over the limited q range accessible, the peaks disperse as expected for a spin wave and in agreement with inelastic neutron scattering (INS) results. At the higher q values damping is observed with the peaks weakening and broadening. This damping is less pronounced than in the INS studies. The RIXS results are also compared with ab initio spin fluctuation calculations. The calculations slightly underestimate the energy dispersion and the damping is larger than in the measurement. Nevertheless, the agreement between the RIXS results, INS studies, and the theory is quite satisfactory. For the single crystal of nickel, the measured q dispersion flattens out rapidly and the peaks broaden. The strong damping effect is reproduced by the spin fluctuation calculations but the energy of the peaks is largely overestimated. Nevertheless, the flattening of the dispersion is not reproduced by the calculations and, although similar effects were observed in early INS experiments, they are not seen in more recent work. Possible reasons for this are discussed. These measurements show that using soft x-ray RIXS to study spin fluctuations in metallic systems, which are in general very challenging for the technique, has much promise. More interestingly, since the iron measurements were performed on a 10-nm thin film, the study opens the possibility to study tailor-made thin-film samples, which cannot be easily studied by other techniques. Combining these studies with state-of-the-art ab initio calculations opens up interesting prospects for testing our understanding of spin waves in metallic systems.
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页数:10
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共 57 条
  • [11] Theory of spin excitations in Fe(110) multilayers
    Costa, AT
    Muniz, RB
    Mills, DL
    [J]. PHYSICAL REVIEW B, 2003, 68 (22)
  • [12] Cowan RD., 1981, THEORY ATOMIC STRUCT
  • [13] MAGNETIC DICHROISM IN L(2,3) EMISSION OF FE, CO, AND NI FOLLOWING ENERGY-DEPENDENT EXCITATION WITH CIRCULARLY-POLARIZED X-RAYS
    DUDA, LC
    STOHR, J
    MANCINI, DC
    NILSSON, A
    WASSDAHL, N
    NORDGREN, J
    SAMANT, MG
    [J]. PHYSICAL REVIEW B, 1994, 50 (22): : 16758 - 16761
  • [14] EFFECTS OF CONFIGURATION INTERACTION ON INTENSITIES AND PHASE SHIFTS
    FANO, U
    [J]. PHYSICAL REVIEW, 1961, 124 (06): : 1866 - &
  • [15] SAXES, a high resolution spectrometer for resonant x-ray emission in the 400-1600 eV energy range
    Ghiringhelli, G.
    Piazzalunga, A.
    Dallera, C.
    Trezzi, G.
    Braicovich, L.
    Schmitt, T.
    Strocov, V. N.
    Betemps, R.
    Patthey, L.
    Wang, X.
    Grioni, M.
    [J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 2006, 77 (11)
  • [16] Long-Range Incommensurate Charge Fluctuations in (Y,Nd)Ba2Cu3O6+x
    Ghiringhelli, G.
    Le Tacon, M.
    Minola, M.
    Blanco-Canosa, S.
    Mazzoli, C.
    Brookes, N. B.
    De Luca, G. M.
    Frano, A.
    Hawthorn, D. G.
    He, F.
    Loew, T.
    Sala, M. Moretti
    Peets, D. C.
    Salluzzo, M.
    Schierle, E.
    Sutarto, R.
    Sawatzky, G. A.
    Weschke, E.
    Keimer, B.
    Braicovich, L.
    [J]. SCIENCE, 2012, 337 (6096) : 821 - 825
  • [17] Advanced capabilities for materials modelling with QUANTUM ESPRESSO
    Giannozzi, P.
    Andreussi, O.
    Brumme, T.
    Bunau, O.
    Nardelli, M. Buongiorno
    Calandra, M.
    Car, R.
    Cavazzoni, C.
    Ceresoli, D.
    Cococcioni, M.
    Colonna, N.
    Carnimeo, I.
    Dal Corso, A.
    de Gironcoli, S.
    Delugas, P.
    DiStasio, R. A., Jr.
    Ferretti, A.
    Floris, A.
    Fratesi, G.
    Fugallo, G.
    Gebauer, R.
    Gerstmann, U.
    Giustino, F.
    Gorni, T.
    Jia, J.
    Kawamura, M.
    Ko, H-Y
    Kokalj, A.
    Kucukbenli, E.
    Lazzeri, M.
    Marsili, M.
    Marzari, N.
    Mauri, F.
    Nguyen, N. L.
    Nguyen, H-V
    Otero-de-la-Roza, A.
    Paulatto, L.
    Ponce, S.
    Rocca, D.
    Sabatini, R.
    Santra, B.
    Schlipf, M.
    Seitsonen, A. P.
    Smogunov, A.
    Timrov, I.
    Thonhauser, T.
    Umari, P.
    Vast, N.
    Wu, X.
    Baroni, S.
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2017, 29 (46)
  • [18] Spin dynamics from time-dependent density functional perturbation theory
    Gorni, Tommaso
    Timrov, Iurii
    Baroni, Stefano
    [J]. EUROPEAN PHYSICAL JOURNAL B, 2018, 91 (10)
  • [19] OBSERVATION OF MAGNETIC CIRCULAR-DICHROISM IN FE L2,3 X-RAY-FLUORESCENCE SPECTRA
    HAGUE, CF
    MARIOT, JM
    STRANGE, P
    DURHAM, PJ
    GYORFFY, BL
    [J]. PHYSICAL REVIEW B, 1993, 48 (05): : 3560 - 3562
  • [20] Multiplet ligand-field theory using Wannier orbitals
    Haverkort, M. W.
    Zwierzycki, M.
    Andersen, O. K.
    [J]. PHYSICAL REVIEW B, 2012, 85 (16)