Mossbauer spectroscopic properties of tin-doped iron oxides

被引：21

作者：

Berry, FJ ^{[1
]}

Helgason, Ö

机构：

[1] Open Univ, Dept Chem, Milton Keynes MK7 6AA, Bucks, England

[2] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland

来源：

HYPERFINE INTERACTIONS | 2000年 / 126卷 / 1-4期

关键词：

Mossbauer spectroscopy; tin-doped iron oxides;

D O I：

10.1023/A:1012639216406

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The Fe-57 Mossbauer spectra recorded in situ from tin-doped Fe3O4 at elevated temperature in vacuo shows the Curie temperature to decrease with increasing concentrations of the dopant. Thermal treatment under oxidising conditions results in the initial formation of tin-doped gamma-Fe2O3 which subsequently undergoes a phase transformation to tin-doped alpha-Fe2O3. Fe-57 Mossbauer spectroscopy at elevated temperatures shows the Neel temperature for tin-doped gamma-Fe2O3 to be lower than that of pure gamma-Fe2O3. The Sn-119 Mossbauer spectra recorded from all the tin-doped iron oxides show the presence of a hyperfine magnetic field at the Sn4+ site which is more complex in the spectra recorded from tin-doped gamma-Fe2O3 and alpha-Fe2O3.

引用

页码：269 / 275

页数：7

共 5 条

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Berry, FJ ;

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Helgason, O ;

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[2] The structural characterization of tin- and titanium-doped alpha-Fe2O3 prepared by hydrothermal synthesis [J].

Berry, FJ ;

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JOURNAL OF SOLID STATE CHEMISTRY, 1997, 130 (02) :272-276

[3] The high temperature properties of tin-doped magnetite [J].

Berry, FJ ;

Helgason, O ;

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JOURNAL OF SOLID STATE CHEMISTRY, 1996, 122 (02) :353-357

[4] HIGH-TEMPERATURE MOSSBAUER-SPECTROSCOPY OF TITANOMAGNETITE AND MAGHEMITE IN BASALTS [J].

HELGASON, O ;

GUNNLAUGSSON, HP ;

JONSSON, K ;

STEINTHORSSON, S .

HYPERFINE INTERACTIONS, 1994, 91 (1-4) :595-599

[5]

HELGASON O, 1996, P INT C APPL MOSSB E, P59

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