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Observation of Topological Hall Effect and Signature of Room Temperature Antiskyrmions in Mn-Ni-Ga D2d Heusler magnets
Subir Sen, Charanpreet Singh, Prashanta K. Mukharjee +2
Topologically stable nontrivial spin structures, such as skyrmions and antiskyrmions, display a large topological Hall effect owing to their quantized topological charge. Here, we…
Field induced topological Hall effect in non-coplanar triangular antiferromagnetic geometry of Mn3Sn
Pradeep K. Rout, P. V. Prakash Madduri, Subhendu K. Manna +1
Non-collinear triangular antiferromagnets with a coplanar spin arrangement and vanishing net magnetic moment can exhibit a large anomalous Hall effect owing to their non-vanishing…
Completely compensated ferrimagnetism and sublattice spin crossing in the half-metallic Heusler compound Mn1.5FeV0.5Al
Rolf Stinshoff, Ajaya K. Nayak, Gerhard H. Fecher +5
The Slater-Pauling rule states that L21 Heusler compounds with 24 valence electrons do never exhibit a total spin magnetic moment. In case of strongly localized magnetic moments at…
Large anomalous Hall effect driven by non-vanishing Berry curvature in non-collinear antiferromagnetic Mn3Ge
Ajaya K. Nayak, Julia Fischer, Yan Sun +9
It is well established that the anomalous Hall effect that a ferromagnet displays scales with its magnetization. Therefore, an antiferromagnet that has no net magnetization should…
Design of compensated ferrimagnetic Heusler alloys for giant tunable exchange bias
Ajaya K. Nayak, Michael Nicklas, Stanislav Chadov +10
The discovery of materials with improved functionality can be accelerated by rational material design. Heusler compounds with tunable magnetic sublattices allow to implement this c…
Structural, magnetic, magnetocaloric and magneto-transport properties in Ge doped Ni-Mn-Sb Heusler Alloys
Roshnee Sahoo, Ajaya K. Nayak, K. G. Suresh +1
The effect of Ge substitution on the magnetic, magnetocaloric and transport properties of Ni45Co5Mn38Sb12-xGex (x=0-3) has been investigated. The decrease in the exchange interacti…
Effect of Fe substitution on the magnetic, transport, thermal and magnetocaloric properties in Ni50Mn38-xFexSb12 Heusler alloys
Roshnee Sahoo, Ajaya K. Nayak, K. G. Suresh +1
The structural, magnetic, transport, thermal and magnetothermal properties of quaternary Heusler alloys Ni50Mn38-xFexSb12 have been studied. Powder x-ray diffraction and temperatur…
Effect of Si and Ga substitutions on the magnetocaloric properties of NiCoMnSb quaternary Heusler alloys
Roshnee Sahoo, Ajaya K. Nayak, K. G. Suresh +1
The effect of Si and Ga substitutions on the magnetic and the magnetocaloric properties in Heusler based system Ni46Co4Mn38Sb12-xZx (Z=Si and Ga) has been studied. From the M(T) pl…
Giant inverse magnetocaloric effect near room temperature in Co substituted NiMnSb Heusler alloys
Ajaya K Nayak, K G Suresh, A K Nigam
The effect of Co on the structural, magnetic and magnetocaloric effect (MCE) of Ni50-xCoxMn38Sb12 (x=0,2,3,4,5) Heusler alloys was studied. Using x-ray diffraction, we show the evo…
Observation of enhanced exchange bias behavior in NiCoMnSb Heusler alloys
Ajaya K. Nayak, K. G. Suresh, A. K. Nigam
We report the observation of large exchange bias in Ni50-xCoxMn38Sb12 Heusler alloys with x=0, 2, 3, 4, 5, which is attributed to the coexistence of ferromagnetic and antiferromagn…
Pressure induced magnetic and magnetocaloric properties in NiCoMnSb Heusler alloy
Ajaya K. Nayak, K. G. Suresh, A. K. Nigam +2
The effect of pressure on the magnetic and the magnetocaloric properties around the martensitic transformation temperature in NiCoMnSb Heusler alloy has been studied. The martensit…
Irreversibility of field-induced magnetostructural transition in NiCoMnSb shape memory alloy revealed by magnetization, transport and heat capacity studies
Ajaya K. Nayak, K. G. Suresh, A. K. Nigam
The effects of magnetic field on the martensitic transition have been studied in Ni45Co5Mn38Sb12. We find a large field-induced irreversibility in this system, as revealed by the f…