Absolute measurement of the critical scattering cross section in cobalt

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Small-angle neutron scattering techniques have been used to study the angular distribution of the critical scattering from cobalt above T/sub c/. These measurements have been put on an absolute scale by calibrating the critical scattering directly against the nuclear incoherent scattering from cobalt. In this way the interaction range r$sub 1$, which appears in the classical and modified Ornstein--Zernike expressions for the asymptotic form of the spin pair correlation function and is related to the strength of the spin correlations, has been determined. We obtain r$sub 1$/a = 0.46 +- 0.03 for the ratio of the interaction range to the ... continued below

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9 p.

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Glinka, C. J.; Minkiewicz, V. J. & Passell, L. January 1, 1975.

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Small-angle neutron scattering techniques have been used to study the angular distribution of the critical scattering from cobalt above T/sub c/. These measurements have been put on an absolute scale by calibrating the critical scattering directly against the nuclear incoherent scattering from cobalt. In this way the interaction range r$sub 1$, which appears in the classical and modified Ornstein--Zernike expressions for the asymptotic form of the spin pair correlation function and is related to the strength of the spin correlations, has been determined. We obtain r$sub 1$/a = 0.46 +- 0.03 for the ratio of the interaction range to the nearest-neighbor distance in cobalt. This result is in good agreement with theoretical predictions. Lack of agreement among previous determinations of the ratio r$sub 1$/a made in iron failed to provide a definitive comparison with theory. (auth)

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9 p.

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Dep. NTIS

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  • 21. annual conference on magnetism and magnetic materials, Philadelphia, Pennsylvania, USA, 9 Dec 1975

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  • Report No.: BNL--20680
  • Report No.: CONF-751209--18
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 4107360
  • Archival Resource Key: ark:/67531/metadc866365

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1975

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  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 11, 2017, 3:12 p.m.

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Glinka, C. J.; Minkiewicz, V. J. & Passell, L. Absolute measurement of the critical scattering cross section in cobalt, article, January 1, 1975; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc866365/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.