Observation of spatial magnetic correlations in the paramagnetic phase of weak ferromagnets; short-range magnetic order in MnSi at 20 TN
作者： K R A Ziebeck , P J Brown , J G Booth , J A C Bland
DOI: 10.1088/0305-4608/11/6/002
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摘要: Diffuse neutron scattering measurements on MnSi at temperatures up to 20 TN have been carried out using polarisation analysis obtain an unambiguous determination of the paramagnetic response as a function wave-vector Q. At high Q tends that expected for disordered atomic moments magnitude 0.4 beta per Mn atom (which corresponds moment observed in ordered phase). However small extrapolated zero is consistent with localised obtained from susceptibility measurements, namely about 1.4 atom. On basis variation it concluded this difference arises because spatial correlations between over range of, example, 7 AA TN.
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sci-hub.se 参考文章(10)
H. Capellmann, Theory of itinerant ferromagnetism in the 3- d transition metals European Physical Journal B. ,vol. 34, pp. 29- 35 ,(1979) , 10.1007/BF01362776
J. Hubbard, The magnetism of iron Physical Review B. ,vol. 19, pp. 2626- 2636 ,(1979) , 10.1103/PHYSREVB.19.2626
R. E. Watson, A. J. Freeman, Hartree–Fock atomic scattering factors for the iron transition series Acta Crystallographica. ,vol. 14, pp. 27- 37 ,(1961) , 10.1107/S0365110X61000048
J. W. Lynn, Temperature dependence of the magnetic excitations in iron Physical Review B. ,vol. 11, pp. 2624- 2637 ,(1975) , 10.1103/PHYSREVB.11.2624
The effective Curie-Weiss constant of ferromagnetic metals and alloys Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences. ,vol. 273, pp. 247- 258 ,(1963) , 10.1098/RSPA.1963.0086
Y. Ishikawa, G. Shirane, J. A. Tarvin, M. Kohgi, Magnetic excitations in the weak itinerant ferromagnet MnSi Physical Review B. ,vol. 16, pp. 4956- 4970 ,(1977) , 10.1103/PHYSREVB.16.4956
C.N. Guy, Low field magnetic studies of a single crystal of MnSi Solid State Communications. ,vol. 25, pp. 169- 172 ,(1978) , 10.1016/0038-1098(78)91471-0
S Doniach, THEORY OF INELASTIC NEUTRON SCATTERING IN NEARLY FERROMAGNETIC METALS. Proceedings of the Physical Society. ,vol. 91, pp. 86- 96 ,(1967) , 10.1088/0370-1328/91/1/316
H Capellmann, Ferromagnetism and strong correlations in metals Journal of Physics F: Metal Physics. ,vol. 4, pp. 1466- 1476 ,(1974) , 10.1088/0305-4608/4/9/018
K R A Ziebeck, P J Brown, Measurement of the paramagnetic response function in the weak itinerant magnetic compound MnSi using polarised neutron scattering Journal of Physics F: Metal Physics. ,vol. 10, pp. 2015- 2024 ,(1980) , 10.1088/0305-4608/10/9/017