Stable cubic spinels in the Zn-Mn-O system in air

被引：30

作者：

Blasco, J. ^{[1
]}

Garcia, J. ^{[1
]}

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 07期

关键词：

spinel; phase diagram; transparent semiconductors; spin-glass; magnetic semiconductors;

D O I：

10.1016/j.jssc.2006.04.026

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A part of the Zn-Mn-O phase diagram has been studied by using soft synthetic conditions and highly reactive precursors. This procedure allowed us to find and to isolate new single phases in the Zn-rich region. The new compounds are cubic spinels with a nominal composition Mn3-xZnxO4 with x = 1.6 and 1.7. These spinels decompose upon heating giving rise to tetragonal distorted spinels. This survey is focused on the low-temperature region (T <= 700 degrees C) completing previous reports on the Zn-Mn-O phase diagram. We also report the magnetic properties of the new cubic spinels. These samples behave as paramagnets obeying a Curie-Weiss law in a broad temperature range. The effective paramagnetic moment agrees with the nominal mixture of Mn3+ and Mn4+ ions. However, randomness and competitive interactions give rise to the formation of spin-glass phases at very low temperature. (C) 2006 Elsevier Inc. All rights reserved.

引用

页码：2199 / 2205

页数：7

共 22 条

[1] ANGULAR OVERLAP MODEL PARAMETERIZATION OF ANDERSON SUPEREXCHANGE THEORY .1. A QUANTIFICATION OF GOODENOUGH-KANAMORI RULES [J].

ATANASOV, M ;

ANGELOV, S .

CHEMICAL PHYSICS, 1991, 150 (03) :383-393

[2] Structure and magnetic properties of LaMn1-xMgxO3 compounds -: art. no. 094426 [J].

Blasco, J ;

García, J ;

Subías, G ;

Sánchez, MC .

PHYSICAL REVIEW B, 2004, 70 (09) :094426-1

[3] STRUCTURAL, ELECTRONIC, MAGNETIC AND CALORIMETRIC STUDY OF THE METAL-INSULATOR-TRANSITION IN NDNIO3-DELTA [J].

BLASCO, J ;

CASTRO, M ;

GARCIA, J .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1994, 6 (30) :5875-5889

[4] Extrinsic origin of ferromagnetism in doped ZnO [J].

Blasco, Javier ;

Bartolome, Fernando ;

Garcia, Luis M. ;

Garcia, Joaquin .

JOURNAL OF MATERIALS CHEMISTRY, 2006, 16 (23) :2282-2288

[5]

Chamberland B. L., 1970, J SOLID STATE CHEM, V1, P512

[6] PHASE EQUILIBRIA IN SYSTEM ZN-MN-O IN AIR [J].

DRIESSENS, FC ;

RIECK, GD .

JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1966, 28 (08) :1593-+

[7] Interface double-exchange ferromagnetism in the Mn-Zn-O system:: New class of biphase magnetism -: art. no. 217206 [J].

García, MA ;

Ruiz-González, ML ;

Quesada, A ;

Costa-Krämer, JL ;

Fernández, JF ;

Khatib, SJ ;

Wennberg, A ;

Caballero, AC ;

Martín-González, MS ;

Villegas, M ;

Briones, F ;

González-Calbet, JM ;

Hernando, A .

PHYSICAL REVIEW LETTERS, 2005, 94 (21)

[8] Surface activation of manganese oxide electrode for oxygen evolution from seawater [J].

Izumiya, K ;

Akiyama, E ;

Habazaki, H ;

Kawashima, A ;

Asami, K ;

Hashimoto, K ;

Kumagai, N .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 1997, 27 (12) :1362-1368

[9] Transition metal-doped TiO2 and ZnO -: present status of the field [J].

Janisch, R ;

Gopal, P ;

Spaldin, NA .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (27) :R657-R689

[10] SUPEREXCHANGE INTERACTION AND SYMMETRY PROPERTIES OF ELECTRON ORBITALS [J].

KANAMORI, J .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1959, 10 (2-3) :87-98

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