نتایج جستجو برای: neutron scattering

تعداد نتایج: 152497  

Journal: :Physical review letters 2011
Jordan D Thompson Paul A McClarty Henrik M Rønnow Louis P Regnault Andreas Sorge Michel J P Gingras

Paramagnetic correlations in the magnetic material Yb(2)Ti(2)O(7) have been investigated via neutron scattering, revealing a [111] rod of scattering intensity. Assuming interactions between the Yb(3+) ions composed of all symmetry-allowed nearest neighbor exchange interactions and long-range dipolar interactions, we construct a model Hamiltonian that allows for an excellent description of the n...

Journal: :Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics 1999
B E Wyslouzil G Wilemski J L Cheung R Strey J Barker

The two-dimensional patterns in our small angle neutron scattering (SANS) experiments from rapidly moving aerosols are anisotropic. To test the kinematic theory of two-body scattering that describes the anisotropy, we conducted SANS experiments using a constant source of D2O aerosol with droplets moving at approximately 440 m/s, and varied the neutron velocity from 267 to 800 m/s. The theoretic...

Journal: :Physical review letters 2010
B G Ueland J W Lynn M Laver Y J Choi S-W Cheong

We have performed polarized and unpolarized small angle neutron scattering experiments on single crystals of HoMnO(3) and have found that an increase in magnetic scattering at low momentum transfers begins upon cooling through temperatures close to the spin reorientation transition at T(SR) approximately 40 K. We attribute the increase to an uncompensated magnetization arising within antiferrom...

Journal: :Nihon Kessho Gakkaishi 2004

Journal: :Australian Journal of Physics 1997

Journal: :Le Journal de Physique Colloques 1977

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