"Skew" Scattering of Cold Unpolarized Neutrons in Ferromagnetic Crystal
The problem of neutron scattering by a single magnetic atom is theoretically considered in the second order perturbation theory. It is demonstrated that the elastic scattering of unpolarized neutron by a magnetic atom is skewed, i.e., it contains a term including the symmetry of a mixed product of t...
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| Published in: | Journal of the Physical Society of Japan Vol. 82; no. 6; pp. 064714 - 064714-5 |
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| Format: | Journal Article |
| Language: | English |
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The Physical Society of Japan
15-06-2013
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| Abstract | The problem of neutron scattering by a single magnetic atom is theoretically considered in the second order perturbation theory. It is demonstrated that the elastic scattering of unpolarized neutron by a magnetic atom is skewed, i.e., it contains a term including the symmetry of a mixed product of the atom magnetic moment and the wave vectors of incident and scattered neutrons $([\mbi{k}\times \mbi{k}']\cdot \mbi{h})$. The problem of dynamical diffraction of unpolarized neutrons by a perfect ferromagnetic crystal is investigated. We consider the case when the Bragg condition is satisfied for two reciprocal lattice vectors. In this situation the neutron skew scattering manifests itself as a dependence of the diffracted beam intensity on the sign of the crystal magnetization. The diffraction of unpolarized neutrons by a Co crystal has been calculated. The change in the intensity through the magnetization reversal in this case is estimated at 40%. |
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| AbstractList | The problem of neutron scattering by a single magnetic atom is theoretically considered in the second order perturbation theory. It is demonstrated that the elastic scattering of unpolarized neutron by a magnetic atom is skewed, i.e., it contains a term including the symmetry of a mixed product of the atom magnetic moment and the wave vectors of incident and scattered neutrons $([\mbi{k}\times \mbi{k}']\cdot \mbi{h})$. The problem of dynamical diffraction of unpolarized neutrons by a perfect ferromagnetic crystal is investigated. We consider the case when the Bragg condition is satisfied for two reciprocal lattice vectors. In this situation the neutron skew scattering manifests itself as a dependence of the diffracted beam intensity on the sign of the crystal magnetization. The diffraction of unpolarized neutrons by a Co crystal has been calculated. The change in the intensity through the magnetization reversal in this case is estimated at 40%. |
| Author | Udalov, Oleg Georgievich |
| Author_xml | – sequence: 1 givenname: Oleg Georgievich surname: Udalov fullname: Udalov, Oleg Georgievich organization: Institute for Physics of Microstructures RAS, GSP-105, Nizhny Novgorod, Russia |
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| CitedBy_id | crossref_primary_10_1088_1361_648X_ab5769 crossref_primary_10_1134_S0021364015220117 crossref_primary_10_1103_PhysRevB_90_064202 crossref_primary_10_1103_PhysRevB_103_054429 crossref_primary_10_1134_S1063783416110354 crossref_primary_10_3367_UFNr_2016_02_037762 |
| Cites_doi | 10.1103/PhysRev.71.294 10.1103/PhysRevLett.102.186602 10.1080/10448639208218770 10.1103/PhysRevLett.65.1655 10.1103/PhysRev.160.421 10.1103/PhysRevB.19.3957 10.1103/PhysRevLett.93.096806 10.1103/PhysRevB.70.125321 10.1002/pssb.2220730106 10.1103/PhysRevB.27.7239 10.1103/PhysRevLett.90.196602 10.1103/PhysRevB.10.5192 10.1103/PhysRevB.14.144 10.1016/0375-9601(78)90132-9 10.1103/PhysRev.55.898 10.1103/PhysRevLett.69.3593 10.1126/science.1058161 |
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| Title | "Skew" Scattering of Cold Unpolarized Neutrons in Ferromagnetic Crystal |
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