6533b857fe1ef96bd12b44ed
RESEARCH PRODUCT
Large Zero-Field Cooled Exchange-Bias in BulkMn2PtGa
Jürgen WinterlikStanislav ChadovMichael NicklasChandra ShekharYu. SkourskiAjaya K. NayakClaudia Felsersubject
010302 applied physicsCondensed Matter - Materials ScienceMaterials scienceMagnetic domainCondensed matter physicsMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesGeneral Physics and Astronomy02 engineering and technologyengineering.material021001 nanoscience & nanotechnologyHeusler compound01 natural sciencesCondensed Matter::Materials ScienceParamagnetismMagnetic anisotropyMagnetizationExchange biasFerrimagnetism0103 physical sciencesengineeringAntiferromagnetismCondensed Matter::Strongly Correlated Electrons0210 nano-technologydescription
We report a large exchange-bias (EB) effect after zero-field cooling the new tetragonal Heusler compound Mn2PtGa from the paramagnetic state. The first-principle calculation and the magnetic measurements reveal that Mn2PtGa orders ferrimagnetically with some ferromagnetic (FM) inclusions. We show that ferrimagnetic (FI) ordering is essential to isothermally induce the exchange anisotropy needed for the zero-field cooled (ZFC) EB during the virgin magnetization process. The complex magnetic behavior at low temperatures is characterized by the coexistence of a field induced irreversible magnetic behavior and a spin-glass-like phase. The field induced irreversibility originates from an unusual first-order FI to antiferromagnetic transition, whereas, the spin-glass like state forms due to the existence of anti-site disorder intrinsic to the material.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-02-21 | Physical Review Letters |