SIUC Physics Seminar
School of Physics and Applied Physics, Southern Illinois University--Carbondale
2025 February 21 Friday 4:00 PM:
Physics Seminar in Neckers 440
Title: Phase Transitions, Magnetocaloric Effects,
and Magneto Transport Properties of the Heusler Alloy
Ni47Bi3Mn35In15
Speaker: Abhiyan Oli
Affiliation: Southern Illinois University--Carbondale
Abstract:
In this work we investigate the magnetocaloric properties of a Heusler alloy
Ni47Bi3Mn35In15
with a focus on their structural, magnetic, and transport properties
by substituting 3% Bi in Ni site. By using the X-ray diffractometer,
we observe the alloy crystallized in a primitive cubic-like structure
described as L21 space group with a lattice constant a=5.946 Å.
Magnetization measurements reveal that the alloy exhibits a first order
transition from antiferromagnetic (AFM) to a ferromagnetic (FM) state
at TM ≈ 200 K and a second-order phase transition (SOPT) from
(FM) to a paramagnetic (PM) at the Curie temperature TC = 313 K
in an applied magnetic field of H = 100 Oe. In addition, this alloy
exhibits maximum magnetic entropy change of
|Δ SM|=6.0 Jkg-1K-1
and a significant relative cooling power (RCP) of 336 J/kg
in the vicinity of the Curie temperature with H=50 kOe.
The resistivity was found to exhibit a typical behavior for
the Heusler alloys measured at zero field.
Last updated on
by K V Shajesh
(kvshajesh@gmail.com).