Electronic and magnetic ground state of MnB^sub 4

Recent studies have dealt with the electronic and magnetic ground state properties of the tetraboride material MnB4. So far, however, the ground state properties could not be established unambiguously. Therefore, here we present an experimental study on single-crystalline MnB4 by means of resistivit...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 695; p. 2149
Main Authors Steinki, N, Winter, JL, Grachtrup, D Schulze, Menzel, D, Süllow, S, Knappschneider, A, Albert, B
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier BV 25.02.2017
Subjects
Band structure
Band structure of solids
Chemical compounds
Electric properties
Electrical resistivity
Ground state
Magnetic properties
Single crystals
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Summary:Recent studies have dealt with the electronic and magnetic ground state properties of the tetraboride material MnB4. So far, however, the ground state properties could not be established unambiguously. Therefore, here we present an experimental study on single-crystalline MnB4 by means of resistivity and magnetization measurements. For this, we have developed a sample holder that allows four-point ac resistivity measurements on these very small (~100 µm) samples. With our data we establish that the electronic ground state of MnB4 is intrinsically that of a pseudo-gap system, in agreement with recent band structure calculations. Furthermore, we demonstrate that the material does neither show magnetic order nor a behavior arising from the vicinity to a magnetically ordered state, this way disproving previous claims.
ISSN:0925-8388
1873-4669