A Mossbauer study of the Verwey transition in cobalt-doped magnetite

被引：17

作者：

Sorescu, M ^{[1
]}

Grabias, A

Brand, RA

Voss, J

Tarabasanu-Mihaila, D

Diamandescu, L

机构：

[1] Duquesne Univ, Dept Phys, Bayer Ctr, Pittsburgh, PA 15282 USA

[2] Inst Elect Mat Technol, PL-01919 Warsaw, Poland

[3] Univ Duisburg Gesamthsch, D-47048 Duisburg, Germany

[4] IFA, Natl Inst Mat Phys, Bucharest, Romania

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 246卷 / 03期

基金：

美国国家科学基金会;

关键词：

magnetite; Mossbauer spectroscopy; Verwey transition; hyperfine fields; symmetry;

D O I：

10.1016/S0304-8853(02)00112-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The low-temperature behavior of the Co-doped magnetite is studied. The Fe3-xCoxO4 powders (x = 0.01 - 1) have been prepared by the hydrothermal method. In order to investigate the cobalt influence on the structure of magnetite, transmission Mossbauer spectroscopy measurements were performed at temperatures close and below the Verwey transition temperature characteristic for pure magnetite (122 and 77 K, respectively). All spectra were fitted with five components and related to nonequivalent Fe2+ and Fe3+ sites. The hyperfine parameters of these sites as well as their relative fractions in the powder samples were determined. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：399 / 403

页数：5

共 10 条

[1] MAGNETIZATION AND EXCHANGE IN NONSTOICHIOMETRIC MAGNETITE [J].

ARAGON, R .

PHYSICAL REVIEW B, 1992, 46 (09) :5328-5333

[2] MOSSBAUER STUDY OF THE HIGH-TEMPERATURE PHASE OF CO-SUBSTITUTED MAGNETITES, COXFE3-XO4 .1. X-LESS-THAN-OR-EQUAL-TO-0.04 [J].

DEGRAVE, E ;

PERSOONS, RM ;

VANDENBERGHE, RE ;

DEBAKKER, PMA .

PHYSICAL REVIEW B, 1993, 47 (10) :5881-5893

[3] Hydrothermal synthesis and structural characterization of some substituted magnetites [J].

Diamandescu, L ;

Mihaila-Tarabasanu, D ;

Teodorescu, V ;

Popescu-Pogrion, N .

MATERIALS LETTERS, 1998, 37 (06) :340-348

[4] MOSSBAUER-EFFECT AND CHARGE-TRANSFER IN COBALT-IRON FERRITES [J].

FRANKE, H ;

ROSENBERG, M .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1977, 4 (1-4) :186-192

[5] MOSSBAUER MEASUREMENTS OF MAGNETITE BELOW VERWEY TRANSITION [J].

HARGROVE, RS ;

KUNDIG, W .

SOLID STATE COMMUNICATIONS, 1970, 8 (05) :303-&

[6] NMR in magnetite below and around the Verwey transition [J].

Novák, P ;

Stepánková, H ;

Englich, J ;

Kohout, J ;

Brabers, VAM .

PHYSICAL REVIEW B, 2000, 61 (02) :1256-1260

[7] ON THE VERWEY TRANSITION IN COBALT-SUBSTITUTED MAGNETITE AS DETERMINED BY FE-57 MOSSBAUER-SPECTROSCOPY [J].

PERSOONS, RM ;

DEGRAVE, E .

SOLID STATE COMMUNICATIONS, 1989, 72 (10) :977-980

[8] MOSSBAUER STUDY OF THE HIGH-TEMPERATURE PHASE OF CO-SUBSTITUTED MAGNETITES, COXFE3-X O4 .2. X-GREATER-THAN-OR-EQUAL-TO-0.1 [J].

PERSOONS, RM ;

DEGRAVE, E ;

DEBAKKER, PMA ;

VANDENBERGHE, RE .

PHYSICAL REVIEW B, 1993, 47 (10) :5894-5905

[9] Direct evidence for cobalt substitution effects in magnetite [J].

Sorescu, M ;

Oberst, T ;

Gossett, K ;

Tarabasanu, D ;

Diamandescu, L .

SOLID STATE COMMUNICATIONS, 2000, 113 (10) :573-575

[10] CHARGE ORDERING IN MAGNETITE AT LOW-TEMPERATURES [J].

ZUO, JM ;

SPENCE, JCH ;

PETUSKEY, W .

PHYSICAL REVIEW B, 1990, 42 (13) :8451-8464

← 1 →