Abstract
Using single crystal neutron diffraction, we studied the H (∥ b) - T phase diagram of the antiferromagnetic olivine Mn2 AS4 (A = Si, Ge). We identified the two spin-flop phases at high fields that are separated by field-independent phase boundaries terminated at multicritical points. In the low temperature phase, the magnetic structures consist of antiferromagnetic Cz - Cz′ and ferromagnetic Fx′ components. In the high temperature phase, in contrast, they are replaced by Cx - Cx′ and Fz′. The absence of the anomalies in the DC magnetization data across the spin-reorientation transitions is discussed in terms of the Clausius-Clapeyron relation.
Original language | English |
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Pages (from-to) | 832-837 |
Number of pages | 6 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 322 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2010 Apr |
Keywords
- Magnetic phase diagram
- Multicriticality
- Neutron scattering
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics