Campus Units

Chemistry, Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

2005

Journal or Book Title

Zeitschrift für Kristallographie - Crystalline Materials

Volume

220

Issue

2/3

First Page

95

Last Page

101

DOI

10.1524/zkri.220.2.95.59124

Abstract

Single crystals of the new compound Tb3Zn3.6(1)Al7.4(1) were obtained from Al and Zn-rich ternary solutions. The title compound crystallizes in the orthorhombic La3Al11 structure type (space group Immm (No. 71), Z = 2; a = 4.2334(1) Å, b = 9.9725(3) Å, c = 12.4659(1) Å). The inverse susceptibility above ca. 50 K shows Curie-Weiss behavior, and a metamagnetic transition is apparent in the T = 2 K field-dependent magnetization around Hc ∼ 20 kG. The resistivity increases with temperature in a roughly linear fashion, indicating the metallic character of this material. TB-LMTO-ASA electronic structure calculations indicate that this new intermetallic phase has all bonding states optimized in the [Zn4–xAl7+x] network, which classifies this compound among the so-called “polar intermetallics”. The calculations also provide a rationalization of the nonrandom ordering of Zn and Al atoms, which can be attributed to optimizing (Zn, Al)—(Zn, Al) orbital interactions.

Comments

This article is from Zeitschrift für Kristallographie - Crystalline Materials 220 (2005): 95, doi:10.1524/zkri.220.2.95.59124. Posted with permission.

Copyright Owner

Oldenbourg Wissenschaftsverlag, Munchen

Language

en

File Format

application/pdf

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