MnTe

MnTe – Antiferromagnetic Semiconductor for Spintronic and Quantum Applications

Chemical Formula: MnTe
Crystal Structure: Hexagonal (NiAs-type)
Growth Method: Self-flux / Modified Bridgman Method
Purity: ≥ 99.999% (metals basis, verified via EDS & ICP-MS)
Availability: Single Crystal Form (as-grown plates or oriented slabs)

For orders and inquiries: contact@xtalsphere.com

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Overview

Manganese Telluride (MnTe) is a p-type antiferromagnetic semiconductor that has recently attracted attention for its spintronic, magneto-transport, and thermoelectric applications.
At room temperature, MnTe crystallizes in the NiAs-type hexagonal structure, showing collinear antiferromagnetic ordering below ~310 K (Néel temperature).
The delicate balance between its magnetic order and carrier transport makes MnTe a model system to study magneto-electric coupling and magnetic topological behavior.

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Synthesis & Crystal Growth

High-quality MnTe single crystals are grown at Xtalsphere through solid-state reaction followed by controlled slow cooling.
We ensure:

• Ultra-pure elemental precursors (≥99.999%)

• Optimized temperature profiles for homogeneous melt growth

• Oxygen-free sealed ampoule synthesis

• Natural cleavage along (0001) planes for smooth, mirror-like crystal surfaces

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Characterization

Xtalsphere’s MnTe crystals undergo comprehensive structural and physical property analysis:

• Powder & Single-Crystal XRD: Confirms phase purity and crystallographic orientation (space group P6₃/mmc).

• Raman Spectroscopy: Identifies characteristic phonon modes near 120–170 cm⁻¹.

• SEM–EDS: Shows uniform grain morphology and elemental stoichiometry close to 1:1 Mn:Te ratio.

• Laue Diffraction: Used for orientation verification in single crystals.

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Electrical & Hall Measurements

• Resistivity (ρ-T): Displays semiconducting behavior with resistivity increasing with decreasing temperature.

• Hall Effect: Positive Hall coefficient indicating p-type conduction.
  Typical room-temperature carrier concentration: ~10¹⁸ cm⁻³.

• Magnetoresistance: Small positive MR below the Néel temperature due to spin-scattering suppression.

All transport measurements are carried out using PPMS (Quantum Design) systems to ensure accuracy and reproducibility.

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Magnetic Properties

• Antiferromagnetic transition (Tₙ): ≈ 310 K

• Magnetization (M–H): Linear with applied field below Tₙ, confirming AFM order.

• No parasitic ferromagnetism detected — indicative of high crystal quality and chemical homogeneity.

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Purity & Quality Assurance

Xtalsphere ensures research-grade purity through:

• Controlled atmosphere synthesis

• ICP-MS verification of trace impurities

• No secondary phases observed in XRD or EDS mapping
  Each crystal batch is individually characterized and documented before dispatch.

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Applications

• Quantum & spintronic research

• Antiferromagnetic semiconductors

• Thermoelectric studies

• Thin-film heterostructure seed crystals

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Contact

For purchase, custom growth requests, or technical specifications:
www.xtalsphere.com