2 research outputs found
Magnetocrystalline Anisotropy and Magnetocaloric Effect Studies on the Room-temperature 2D Ferromagnetic CrTe
We present a thorough study on the magnetoanisotropic properties and
magnetocaloric effect in the layered ferromagnetic CrTe single crystals
by performing the critical behaviour analysis of magnetization isotherms. The
critical exponents =0.485(3), =1.202(5), and =3.52(3)
with a Curie temperature of K are determined by the
modified Arrott plots. We observe a large magnetocrystalline anisotropy
K=330 kJ/ at 3 K which gradually decreases with increasing
temperature. Maximum entropy change - and the relative
cooling power (RCP) are found to be 2.77 and 88.29 ,
respectively near when the magnetic field applied parallel to
-plane. Rescaled - data measured at various
temperatures and fields collapse into a single universal curve, confirming the
second order magnetic transition in this system. Following the renormalization
group theory analysis, we find that the spin-coupling is of 3D Heisenberg-type,
, with long-range exchange interactions decaying as .Comment: 10 pages, 7 figure
Investigation of the Anomalous and Topological Hall Effects in Layered Monoclinic Ferromagnet CrTe
We studied the electrical transport, Hall effect, and magnetic properties of
monoclinic layered ferromagnet CrTe. Our studies demonstrate
CrTe to be a soft ferromagnet with strong magnetocrystalline
anisotropy. Below 50 K, the system shows an antiferromagnetic-like transition.
Interestingly, between 50 and 150 K, we observe fluctuating magnetic moments
between in-plane and out-of-plane orientations, leading to non-coplanar spin
structure. On the other hand, the electrical resistivity data suggest it to be
metallic throughout the measured temperature range, except a at around
50 K due to AFM ordering. The Rhodes-Wohlfarth ratio
calculated from our magnetic studies
confirms that CrTe is an itinerant ferromagnet. Large anomalous
Hall effect has been observed due to the skew-scattering of impurities and the
topological Hall effect has been observed due to non-coplanar spin-structure in
the presence of strong magnetocrystalline anisotropy. We examined the mechanism
of anomalous Hall effect by employing the first principles calculations.Comment: 9 pages, 6 figures, To appear in Physical Review Material