Thermoelectric power studies of magnesium and aluminium substituted lithium ferrites

被引：3

作者：

Ashok, C ^{[1
]}

Ravinder, D ^{[1
]}

机构：

[1] Osmania Univ, Dept Phys, PG Coll Sci, Hyderabad 500004, Andhra Pradesh, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2005年 / 394卷 / 1-2期

关键词：

thermoelectric power; Mg-Al-Li ferrites; n-type semiconductors; Seebeck coefficient;

D O I：

10.1016/j.jallcom.2004.09.059

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thermoelectric power studies of Mg and Al substituted Li ferrites of various compositions were investigated from room temperature to well beyond the Curie temperature by the differential method. The Seebeck coefficient is negative for all the compositions showing that these ferrites behave as n-type semiconductors. The temperature variation of the Seebeck coefficient is also discussed. On the basis of these results, an explanation for the conduction mechanism in Mg-Al-Li mixed ferrites is suggested. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：5 / 7

页数：3

共 10 条

[1] RESISTIVITY AND THERMOELECTRIC-POWER OF NI-AL FERRITES [J].

AHMED, MA ;

ELNIMR, MK ;

TAWFIK, A ;

ELHASAB, AM .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1991, 123 (02) :501-506

[2] MOLECULAR-FIELD COEFFICIENTS OF TI-4+-SUBSTITUTED AND ZN-2+-SUBSTITUTED LITHIUM FERRITES [J].

DIONNE, GF .

JOURNAL OF APPLIED PHYSICS, 1974, 45 (08) :3621-3626

[3]

MALIK MA, 1994, MOD PHYS LETT, V16, P947

[4] High temperature thermoelectric power studies of cobalt and titanium substituted barium hexagonal ferrites [J].

Ravinder, D ;

Shalini, P ;

Mahesh, P ;

Boyanov, BS .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 268 (1-2) :154-158

[5] Frequency and composition dependence of dielectric behavior of copper substituted lithium ferrites [J].

Ravinder, D ;

Reddy, PVB ;

Shalini, P .

JOURNAL OF MATERIALS SCIENCE LETTERS, 2003, 22 (22) :1599-1601

[6] Electrical conductivity and thermoelectric power studies of aluminium-substituted lithium ferrites [J].

Ravinder, D ;

Mohan, GR ;

Sagar, DR ;

Prankishan ;

Kumar, N .

MATERIALS LETTERS, 2000, 43 (03) :122-128

[7] THERMOELECTRIC-POWER STUDIES OF LI-NI MIXED FERRITES [J].

REDDY, PV ;

RAO, TS .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1985, 92 (01) :303-307

[8] ELECTRICAL TRANSPORT-PROPERTIES OF MANGANESE MAGNESIUM MIXED FERRITES [J].

REDDY, VD ;

MALIK, MA ;

REDDY, PV .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1991, 8 (04) :295-301

[9] Preparation and characterization of Zn substituted Li-Mg ferrites [J].

Shaikh, AM ;

Watawe, SC ;

Jadhav, SA ;

Chougule, BK .

MATERIALS RESEARCH BULLETIN, 2002, 37 (15) :2547-2555

[10] THE ELECTRICAL-CONDUCTIVITY AND THERMOELECTRIC-POWER OF LITHIUM FERRITE IN THE VICINITY OF THE ORDER-DISORDER TRANSITION-TEMPERATURE [J].

WHALL, TE ;

SALERNO, N ;

PROYKOVA, Y ;

MIRZA, KA ;

MAZEN, S .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1986, 53 (05) :L107-L113

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