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The first study of antiferromagnetic eosphorite-childrenite series (Mn1−xFex)AlP(OH)2H2O (x=0.5)
- Source :
- Journal of Magnetism and Magnetic Materials. 428:17-27
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- This study presents for the first time the antiferromagnetic structure of the eosphorite-childrenite series (Mn1-xFex)AlPO4(OH)2H2O (x=0.5), based on neutron single crystal diffraction at 3 K in combination with group theoretical representation analysis. The new magnetic structure is described in the magnetic space group PCmnb, maintaining the atomistic unit cell size (a×b×c) with a ~6.9 A, b ~10.4 A, c ~13.4 A. Mn-rich and Fe-rich zones within solid solution crystals are expanded up to several hundred micrometers, as seen in electron microprobe and polarisation microscopy. Magnetic susceptibility and specific heat measurements on two different eosphorite-childrenite crystals show the magnetic transition temperature between 6.5 K and 6.8 K as the Mn2+/Fe2+ ratio varies over single compositional zones. Below the Neel temperature, a magnetic field between 1.5 T and 2 T parallel to the a-axis causes a 180° spin-flip, reaching the saturation (5.25 μB pfu) toward high magnetic fields.
- Subjects :
- Materials science
Condensed matter physics
Magnetic structure
Analytical chemistry
02 engineering and technology
Electron microprobe
010502 geochemistry & geophysics
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Magnetic susceptibility
Electronic, Optical and Magnetic Materials
Magnetic field
Antiferromagnetism
0210 nano-technology
Néel temperature
Saturation (magnetic)
0105 earth and related environmental sciences
Solid solution
Subjects
Details
- ISSN :
- 03048853
- Volume :
- 428
- Database :
- OpenAIRE
- Journal :
- Journal of Magnetism and Magnetic Materials
- Accession number :
- edsair.doi...........2e9a67488a46c75046ad648431b4837d
- Full Text :
- https://doi.org/10.1016/j.jmmm.2016.12.013