CrB-type, ordered α-MnB: Single crystal structure and spin-canted magnetic behavior
Source abstract
Abstract
Manganese monoboride has a low- (α) and a high-temperature (β) modification, as well as a defect-rich low-temperature variant (α′). The crystal structure (FeB-type structure, s.g. Pnma) and properties of high-temperature MnB are well-known. In this work, single crystals were grown via chemical vapor transport reactions, both of β-MnB and the low-temperature modification, α-MnB. This allowed for determining the crystal structure of defect-free α-MnB [CrB-type structure, s.g. Cmcm, a = 3.0098(6) Å, b = 7.6390(2) Å, and c = 2.94620(6) Å]. Furthermore, α′-MnB, the stacking fault-dominated CrB-variant, was obtained as crystalline powder and characterized by X-ray powder diffraction and transmission electron microscopy. Direction-resolved measurements of the magnetic properties of α-MnB revealed spin-canted magnetic behavior along c and ferromagnetism along a and b with a Curie temperature of 456 K; ferromagnetic β-MnB has a Curie temperature of 568 K.
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Research context
OpenAlex topics: Boron and Carbon Nanomaterials Research · MXene and MAX Phase Materials · Iron-based superconductors research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Eduard-Zintl-Institute of Inorganic and Physical Chemistry, Technische Universität Darmstadt 1 , Peter-Grünberg-Str. 12, 64287 Darmstadt, Germany
Institute of Materials Science, Technische Universität Darmstadt 2 , Peter-Grünberg-Str. 16, 64287 Darmstadt, Germany
Department of Materials and Earth Sciences, Electron Microscopy Center Darmstadt (EMC-DA), Technische Universität Darmstadt 3 , Peter-Grünberg-Str. 2, 64287 Darmstadt, Germany
Funding
State Hesse
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