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Easy derivation of the formula relating the fluctuations of a binary system to the X-ray scattering intensity extrapolated to s = 0 (1990)

Hayashi, H. ; Nishikawa, K. ; Iijima, T.

Copenhagen : International Union of Crystallography (IUCr)

Applied crystallography online 23 (1990), S. 134-135

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ISSN: 1600-5767

Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Thema: Geologie und Paläontologie , Physik

Notizen: Bhatia & Thornton [Phys. Rev. B. (1970), 2, 3004–3012] have derived the formula that relates the scattering intensity of a binary system to the Fourier transform of the local number density and concentration. For the intensity at the limit of zero scattering angle, the same formula can be derived by a much simpler process.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1107/S0021889889012331

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Digitale Medien

Morphology and magnetic properties of ultrafine ZnFe2O4 particles (1990)

Sato, T. ; Haneda, K. ; Seki, M. ; [weitere]

Springer

Applied physics 50 (1990), S. 13-16

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ISSN: 1432-0630

Schlagwort(e): 75.50.-y ; 76.80.+y ; 61.50.-f

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract Well-crystallized ultrafine ZnFe2O4 particles of several nanometers in size have been prepared by the coprecipitation method, and their particle morphology and magnetic properties, especially at low temperatures, examined. Room-temperature X-ray diffraction, transmission electron microscopy, magnetization measurements at various temperatures from 300 K to 4.2 K, and Mössbauer spectroscopy at various temperatures from 300 K to 4.2 K, and at 4.2 K with a longitudinal magnetic field of 16.4 kOe applied have been employed. The formation of short-range and long-range magnetic order in small ZnFe2O4 particles above and below approximately 30 K is discussed. Below 30 K, the appearance of spontaneous magnetization and its hysteretic property is confirmed for small ZnFe2O4 particles.