Phenomenological model of longitudinal spin fluctuations in itinerant antiferromagnets

被引：4
作者：
Solontsov, A. [1 ,2 ,3 ]
Antropov, V. P. [1 ]
机构：
[1] US DOE, Ames Lab, Ames, IA 50011 USA
[2] AA Bochvar Inorgan Mat Res Inst, Moscow 123060, Russia
[3] State Ctr Condensed Matter Phys, Moscow 155569, Russia
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 10期
基金：
俄罗斯基础研究基金会;
关键词：
ELECTRON FERROMAGNETS; MAGNETIC FLUCTUATIONS; CRITICAL DYNAMICS; T-C; EXCITATIONS;
D O I：
10.1103/PhysRevB.81.104403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present the phenomenological analysis of the spectrum of longitudinal spin fluctuations in isotropic itinerant electron antiferromagnets with account of spin anharmonicity giving rise to coupling of transverse and longitudinal normal modes. The spectrum consists of a quasielastic part forming a central peak or a dip, depending on temperature and the Landau relaxation rate. Effects of spin-fluctuation coupling also give rise to an inelastic part of the spectrum which has a form of resonances or antiresonances near the magnon frequencies related to nonpropagating longitudinal excitations.
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页数：7
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共 28 条
  • [1] [Anonymous], 1983, Quantum Theory of Magnetism
  • [2] [Anonymous], 1985, Springer Series in Solid-State Sciences
  • [3] Enhancement of magnetic fluctuations on passing below Tc in the heavy fermion superconductor UPd2Al3
    Bernhoeft, N
    Sato, N
    Roessli, B
    Aso, N
    Hiess, A
    Lander, GH
    Endoh, Y
    Komatsubara, T
    [J]. PHYSICAL REVIEW LETTERS, 1998, 81 (19) : 4244 - 4247
  • [4] SCATTERING OF SLOW-NEUTRONS FROM LONG-WAVELENGTH MAGNETIC FLUCTUATIONS IN UPT3
    BERNHOEFT, NR
    LONZARICH, GG
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 1995, 7 (37) : 7325 - 7333
  • [5] Longitudinal magnetic excitations in classical spin systems
    Bunker, A
    Landau, DP
    [J]. PHYSICAL REVIEW LETTERS, 2000, 85 (12) : 2601 - 2604
  • [6] LONGITUDINAL FLUCTUATIONS IN AN ISOTROPIC ANTIFERROMAGNET
    COX, UJ
    COWLEY, RA
    BATES, S
    CUSSEN, LD
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 1989, 1 (18) : 3031 - 3035
  • [7] Itinerant Magnetic Excitations in Antiferromagnetic CaFe2As2
    Diallo, S. O.
    Antropov, V. P.
    Perring, T. G.
    Broholm, C.
    Pulikkotil, J. J.
    Ni, N.
    Bud'ko, S. L.
    Canfield, P. C.
    Kreyssig, A.
    Goldman, A. I.
    McQueeney, R. J.
    [J]. PHYSICAL REVIEW LETTERS, 2009, 102 (18)
  • [8] Goldstone modes and low-frequency dynamics of incommensurate chromium alloys
    Fishman, RS
    Liu, SH
    [J]. PHYSICAL REVIEW LETTERS, 1996, 76 (13) : 2398 - 2401
  • [9] MAGNETIC EXCITATIONS IN URANIUM NITRIDE
    HOLDEN, TM
    BUYERS, WJL
    SVENSSON, EC
    LANDER, GH
    [J]. PHYSICAL REVIEW B, 1984, 30 (01): : 114 - 121
  • [10] IRKHIN VY, 1994, USP FIZ NAUK+, V164, P705, DOI 10.1070/PU1994v037n07ABEH000033
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