Literature DB >> 19113520

Anisotropic three-dimensional magnetism in CaFe2As2.

R J McQueeney1, S O Diallo, V P Antropov, G D Samolyuk, C Broholm, N Ni, S Nandi, M Yethiraj, J L Zarestky, J J Pulikkotil, A Kreyssig, M D Lumsden, B N Harmon, P C Canfield, A I Goldman.   

Abstract

Inelastic neutron scattering measurements of the magnetic excitations in CaFe2As2 indicate that the spin wave velocity in the Fe layers is exceptionally large and similar in magnitude to the cuprates. However, the spin wave velocity perpendicular to the layers is at least half as large that in the layer, so that the magnetism is more appropriately categorized as anisotropic three-dimensional, in contrast to the two-dimensional cuprates. Exchange constants derived from band structure calculations predict spin wave velocities that are consistent with the experimental data.

Entities:  

Year:  2008        PMID： 19113520     DOI： 10.1103/PhysRevLett.101.227205

Source DB:  PubMed          Journal:  Phys Rev Lett        ISSN： 0031-9007            Impact factor:   9.161


  2 in total

1.  Iron arsenides with three-dimensional FeAs layer networks: Can(n+1)/2(Fe1-xPtx)(2+3n)Ptn(n-1)/2As(n+1)(n+2)/2 (n = 2, 3).

Authors:  Naoyuki Katayama; Seiichiro Onari; Kazuyuki Matsubayashi; Yoshiya Uwatoko; Hiroshi Sawa
Journal:  Sci Rep       Date:  2016-12-20       Impact factor: 4.379

2.  Superelasticity and cryogenic linear shape memory effects of CaFe2As2.

Authors:  John T Sypek; Hang Yu; Keith J Dusoe; Gil Drachuck; Hetal Patel; Amanda M Giroux; Alan I Goldman; Andreas Kreyssig; Paul C Canfield; Sergey L Bud'ko; Christopher R Weinberger; Seok-Woo Lee
Journal:  Nat Commun       Date:  2017-10-20       Impact factor: 14.919
  2 in total

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