TY  - JOUR
AU  - Mishra, Kulbhushan
AU  - Pandey, Shishir Kumar
AU  - Chaudhuri, S.
AU  - Rawat, Rajeev
AU  - Bhobe, P. A.
TI  - Observation of Kondo-like electrical transport in ferromagnetic Fe<sub>2</sub>Ti<sub>1−x</sub>Mn<sub>x</sub>Sn Heusler alloy
JO  - Physical review / B
VL  - 111
IS  - 23
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - PUBDB-2025-04423
SP  - 235146
PY  - 2025
AB  - We investigate the effect of Mn substitution on the electronic, magnetic, and electrical transport properties of Fe2⁢Ti1−𝑥⁢Mn𝑥⁢Sn. Spin-polarized density of states calculations using density functional theory indicate a half-metallic ground state in Mn-rich compositions. Localized magnetic moments at Mn sites interact through the conduction electron cloud. Electrical resistivity and magnetotransport measurements show dominant Kondo-like scattering at low temperatures alongside a distinctive linear negative temperature coefficient of resistance at higher temperatures. These findings are further supported by specific heat measurements. Isothermal magnetization as a function of the applied magnetic field identifies the magnetic ground state of Fe2⁢Ti1−𝑥⁢Mn𝑥⁢Sncompositions as a ferromagnet with a wandering axis that aligns with the direction of the applied field. Temperature-dependent magnetization measurements highlight features indicative of weak anisotropy in the system, while the x-ray diffraction analysis reveals a highly ordered cubic structure with reduced antisite disorder. Investigation of the local crystal structure using x-ray absorption fine structure spectroscopy shows that the random anisotropy arises from local lattice distortions around Mn atoms. These findings shed light on the emergence of a spin-polarized band structure and a unique magnetic ground state in Mn-substituted Fe2⁢Ti1−𝑥⁢Mn𝑥⁢Sn, offering insights into spintronic materials. 
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1103/jnxr-9qf8
UR  - https://bib-pubdb1.desy.de/record/639322
ER  -