Synthesis and crystal structure analysis of the magnetic ternary compound Mn2GeTe4

• Main Authors: Miguel Quintero, Jines E. Contreras, Pedro Grima- Gallardo, Asiloé J. Mora, Luis Betancourt, Gerzon E. Delgado
• Format: Article
• Language: English
• Published: Universidad de Los Andes 2009-05-01
• Series: Avances en Química
• Subjects: Chalcogenides; Semiconductors; Chemical synthesis; X-ray powder diffraction; Crystal structure
• Online Access: http://www.saber.ula.ve/bitstream/123456789/28258/1/articulo1.pdf

Samples of the ternary phase Mn2GeTe4 were synthesized by direct fusion using the anneal method. X-ray powder diffraction results indicated that this material crystallizes with orthorhombic symmetry, space group Pnma, and unit cell parameters: a = 13.950(2) Å, b = 8.115(1) Å, c = 6.592(1) Å, V = 746.2(2) Å3. The Rietveld refinement converged to the figures of merit Rp = 6.9%, Rwp = 8.6%, Rexp = 5.6% and 2 = 2.4. Mn2GeTe4 is the first telluride of the II2-IV-VI4 family that crystallizes with olivine-type structure.