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Magnetic field switching between the two orbital-ordered states in DyVO3
S Miyasaka1, T Yasue, J Fujioka
1Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan.
Physical Review Letters
|February 1, 2008
Summary
This study reveals how temperature and magnetic fields alter spin and orbital ordering in DyVO3 crystals. A novel magnetic-field-induced orbital switching mechanism was discovered, offering insights into complex magnetic materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- DyVO3 exhibits complex spin and orbital ordering (SO and OO) phenomena.
- Understanding phase competition in such materials is crucial for developing advanced magnetic devices.
Purpose of the Study:
- To investigate the critical phase competition between different spin-orbital-ordered states in DyVO3 single crystals.
- To explore the influence of temperature and magnetic fields on these states.
- To elucidate the mechanism of magnetic-field-induced orbital switching.
Main Methods:
- Experimental investigation of DyVO3 single crystal.
- Analysis of temperature-dependent spin and orbital ordering transitions.
- Application of magnetic fields to induce phase transitions and study metamagnetism.
Main Results:
- Observed a reentrant spin and orbital ordering transition (C-->G-->C for SO, G-->C-->G for OO) upon cooling.
- Demonstrated that magnetic fields induce OO transition from C to G and SO transition from G to C.
- Correlated the SO transition with the metamagnetic transition of Dy 4f moments.
Conclusions:
- DyVO3 displays intricate phase competition driven by temperature and magnetic fields.
- A novel mechanism for magnetic-field-induced orbital switching has been identified.
- The findings provide insights into the coupled spin-orbital dynamics in rare-earth vanadates.
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