Electrical transport and magnetoresistance studies on the magnetic moment compensated Mn2V1-xCoxZ (Z=Ga, Al; x=0, 0.25, 0.5, 0.75, 1) Heusler alloys
- Title
- Electrical transport and magnetoresistance studies on the magnetic moment compensated Mn2V1-xCoxZ (Z=Ga, Al; x=0, 0.25, 0.5, 0.75, 1) Heusler alloys
- Creator
- Midhunlal P.V.; Chelvane J.A.; Babu P.D.; Kumar N.H.
- Description
- We report the electrical resistivity and magnetoresistance properties of arc-melted Mn2V1-xCoxZ (Z=Ga, Al; x =0, 0.25, 0.5, 0.75, 1) alloys, which possess compensated ferrimagnetic behaviour with high TC when x=0.5. Apart from metallicity, the alloys in the Ga series with x= 0, 0.75, 1 composition showed a positive to negative crossover in the magnetoresistance versus temperature curves. This crossover was absent for Mn2V0.75Co0.25Ga and the fully compensated ferrimagnet Mn2V0.5Co0.5Ga. In contrast to this, Co-substituted Mn2VAl exhibits distinctly different resistive behaviour. While the alloys Mn2VAl and Mn2CoAl exhibit metallic and semiconducting behaviour respectively, the intermediate compositions show a gradual metallic to semiconducting transition as the Co concentration increases. The compensated ferrimagnet Mn2V0.5Co0.5Al showed a mixed transport behaviour of metallic and semiconducting nature with a resistivity minimum at 140 K. In contrast to this mixed response of the arc-melted bulk sample, the Mn2V0.5Co0.5Al melt-spun ribbon shows a clear semiconducting nature throughout the temperature range, indicating that the sample preparation methods could highly influence the electrical properties of the investigated compensated ferrimagnets. 2024 Elsevier B.V.
- Source
- Journal of Magnetism and Magnetic Materials, Vol-614
- Date
- 2025-01-01
- Publisher
- Elsevier B.V.
- Coverage
- Midhunlal P.V., Department of Sciences and Humanities, School of Engineering and Technology, Christ University, Karnataka, Bangalore, 560074, India; Chelvane J.A., Defence Metallurgical Research Laboratory, Kanchanbagh (PO), Hyderabad, 500058, India; Babu P.D., UGC-DAE Consortium for Scientific Research, Mumbai Center, 246-C, CFB, BARC Campus, Mumbai, Trombay, 400085, India; Kumar N.H., Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
- Rights
- Restricted Access
- Relation
- ISSN: 3048853; CODEN: JMMMD
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Midhunlal P.V.; Chelvane J.A.; Babu P.D.; Kumar N.H., “Electrical transport and magnetoresistance studies on the magnetic moment compensated Mn2V1-xCoxZ (Z=Ga, Al; x=0, 0.25, 0.5, 0.75, 1) Heusler alloys,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/12495.