Low temperature magnetic ordering in Fe-doped TiO2 samples

被引：7

作者：

Bilovol, V. ^{[1
]}

Mudarra Navarro, A. M. ^{[1
]}

Herrera, W. T. ^{[2
]}

Sanchez, D. R. ^{[2
]}

Baggio-Saitovich, E. M. ^{[2
]}

Rodriguez Torres, C. E. ^{[1
]}

Sanchez, F. H. ^{[1
]}

Cabrera, A. F. ^{[1
]}

机构：

[1] UNLP IFLP CCT La Plata CONICET, Dept Fis, Fac Ciencias Exactas, CC 67, RA-1900 La Plata, Argentina

[2] 150 Urca, BR-22290180 Rio De Janeiro, Brazil

来源：

HYPERFINE INTERACTIONS | 2010年 / 195卷 / 1-3期

关键词：

Fe-doped TiO2; Mossbauer spectroscopy; Rutile matrix;

D O I：

10.1007/s10751-009-0113-7

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：

Fe-doped TiO2 samples with different Fe content prepared by mechanical alloying have been investigated by means of Mossbauer spectroscopy at 300 and 4.2 K. The results indicate the coexistence of Fe2+ and Fe3+ ions in paramagnetic states at room temperatures in the rutile structure. All samples present magnetic order at 4.3 K. When the Fe concentration increases the Fe ions in the rutile matrix became closer giving the possibility of strong magnetic interactions between them. The temperature evolution of the magnetic order was followed for the 15 at.% of Fe sample. The Fe-doped oxide formed for this composition orders below 20 K reaching an almost totally magnetic ordered state at 4.3 K.

引用

页码：155 / 159

页数：5

共 5 条

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