Magnetic field induced modification of the incommensurate antiferromagnetic structure of Fe-doped MnNiGe alloys

Riya Roy; Sanat Kumar Adhikari; Sambhu Charan Das; Rosni Roy; Kanai Mondal; Jhuma Sannigrahi; Sabyasachi Pramanick; Kalyanashis De; Dmitry Khalyavin; Devashibhai T. Adroja; Rajib Mondal; Souvik Chatterjee

doi:10.1103/PhysRevB.110.094415

Magnetic field induced modification of the incommensurate antiferromagnetic structure of Fe-doped MnNiGe alloys

Riya Roy, Sanat Kumar Adhikari, Sambhu Charan Das, Rosni Roy, Kanai Mondal, Jhuma Sannigrahi, Sabyasachi Pramanick, Kalyanashis De, Dmitry Khalyavin, Devashibhai T. Adroja, Rajib Mondal, Souvik Chatterjee

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The evolution of the magnetic structure of Fe-doped MnNiGe alloys of nominal compositions MnNi0.75Fe0.25Ge and Mn0.85Fe0.15NiGe has been probed through neutron powder diffraction (NPD) experiments in the presence of external magnetic fields (H). Application of external H results in a significant decrease in the antiferromagnetic satellite peak's intensities along with a considerable change in the incommensurate propagation vector kAFM=(ka,0,0). In addition, a reasonable increase in some of the nuclear reflections has also been noticed, which can clearly be described by the ferromagnetic propagation vector kFM=(0,0,0). Our analysis confirms the gradual rotation of magnetic moments towards the a axis with increasing H and eventual realization of ferromagnetic arrangement at higher applied H.

Original language	English
Article number	094415
Journal	Physical Review B
Volume	110
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.110.094415
Publication status	Published - 1 Sept 2024

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.110.094415

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title = "Magnetic field induced modification of the incommensurate antiferromagnetic structure of Fe-doped MnNiGe alloys",

abstract = "The evolution of the magnetic structure of Fe-doped MnNiGe alloys of nominal compositions MnNi0.75Fe0.25Ge and Mn0.85Fe0.15NiGe has been probed through neutron powder diffraction (NPD) experiments in the presence of external magnetic fields (H). Application of external H results in a significant decrease in the antiferromagnetic satellite peak's intensities along with a considerable change in the incommensurate propagation vector kAFM=(ka,0,0). In addition, a reasonable increase in some of the nuclear reflections has also been noticed, which can clearly be described by the ferromagnetic propagation vector kFM=(0,0,0). Our analysis confirms the gradual rotation of magnetic moments towards the a axis with increasing H and eventual realization of ferromagnetic arrangement at higher applied H.",

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AU - Roy, Riya

AU - Adhikari, Sanat Kumar

AU - Das, Sambhu Charan

AU - Roy, Rosni

AU - Mondal, Kanai

AU - Sannigrahi, Jhuma

AU - Pramanick, Sabyasachi

AU - De, Kalyanashis

AU - Khalyavin, Dmitry

AU - Adroja, Devashibhai T.

AU - Mondal, Rajib

AU - Chatterjee, Souvik

PY - 2024/9/1

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N2 - The evolution of the magnetic structure of Fe-doped MnNiGe alloys of nominal compositions MnNi0.75Fe0.25Ge and Mn0.85Fe0.15NiGe has been probed through neutron powder diffraction (NPD) experiments in the presence of external magnetic fields (H). Application of external H results in a significant decrease in the antiferromagnetic satellite peak's intensities along with a considerable change in the incommensurate propagation vector kAFM=(ka,0,0). In addition, a reasonable increase in some of the nuclear reflections has also been noticed, which can clearly be described by the ferromagnetic propagation vector kFM=(0,0,0). Our analysis confirms the gradual rotation of magnetic moments towards the a axis with increasing H and eventual realization of ferromagnetic arrangement at higher applied H.

AB - The evolution of the magnetic structure of Fe-doped MnNiGe alloys of nominal compositions MnNi0.75Fe0.25Ge and Mn0.85Fe0.15NiGe has been probed through neutron powder diffraction (NPD) experiments in the presence of external magnetic fields (H). Application of external H results in a significant decrease in the antiferromagnetic satellite peak's intensities along with a considerable change in the incommensurate propagation vector kAFM=(ka,0,0). In addition, a reasonable increase in some of the nuclear reflections has also been noticed, which can clearly be described by the ferromagnetic propagation vector kFM=(0,0,0). Our analysis confirms the gradual rotation of magnetic moments towards the a axis with increasing H and eventual realization of ferromagnetic arrangement at higher applied H.

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Magnetic field induced modification of the incommensurate antiferromagnetic structure of Fe-doped MnNiGe alloys

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