MAGNETIC PROPERTIES OF THE Fe2SiO4–Fe3O4 SPINEL SOLID SOLUTIONS

Show simple item record

dc.contributor.author Yamanaka T.
dc.contributor.author Okita M.
dc.date.accessioned 2021-03-17T05:23:34Z
dc.date.available 2021-03-17T05:23:34Z
dc.date.issued 2001
dc.identifier https://www.elibrary.ru/item.asp?id=872441
dc.identifier.citation Physics and Chemistry of Minerals, 2001, 28, 2, 102-109
dc.identifier.issn 0342-1791
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/26854
dc.description.abstract Magnetic measurement of Fe3− x Si x O4 spinel solid solutions indicates that their Curie temperatures decrease gradually, but not linearly, from 851 to 12 K with increasing content of nonmagnetic ions Si4+. Magnetic hysteresis becomes more noticeable in solid solutions having a larger content of Fe2SiO4. Saturation magnetizations of Fe3− x Si x O4 samples increase up to x=0.357 and they are easily saturated in the field of H=0.1 T. However, magnetization of the sample of x=0.794 does not approach saturation even at high field of H=7.0 T and has a large coercive force. The Si4+ disordered distribution is confirmed to be tetr[Fe3+ 1− x + x t Si4+ x (1− t )] octa[Fe2+ 1+ x Fe3+ 1− x − x t Si4+ x t ] O4 by the spin moment, which is consistent with site occupancy obtained from X-ray crystal structure refinement. Their molecular magnetizations would be expressed as M B={4(1+x)+10xt}μB as functions of composition parameter x and Si4+ ordering parameter t of the solid solution. The sample of x=0.794 is antiferromagnetic below the Néel temperature, mainly due to the octahedral cation interaction M O–M O, while both M T–M O and M O–M O interactions induce a ferrimagnetic property. Concerning magnetic spin configuration, in the case of x>0.42, the lowest dɛ level becomes a singlet, resulting in no orbital angular momentum.
dc.subject FE3-x SIx O4 SPINEL SOLID SOLUTION
dc.subject SATURATION MAGNETIZATION
dc.subject MAGNETIC HYSTERESIS
dc.subject BOHR MAGNETON
dc.subject CURIE TEMPERATURE
dc.title MAGNETIC PROPERTIES OF THE Fe2SiO4–Fe3O4 SPINEL SOLID SOLUTIONS
dc.type Статья


Files in this item

This item appears in the following Collection(s)

  • ELibrary
    Метаданные публикаций с сайта https://www.elibrary.ru

Show simple item record