Large negative magnetoresistance in the new antiferromagnetic rare-earth dichalcogenide EuTe${}_2$

Abstract

We report the synthesis and characterization of a rare-earth dichalcogenide EuTe${}_2$. An antiferromagnetic transition was found at T${}_M$ = 11 K. The antiferromagnetic order can be tuned by an applied magnetic field to access a first-order spin flop transition and a spin flip transition. These transitions are associated with a giant negative magnetoresistance with a value of nearly 100\%. Heat capacity measurements reveal strong electronic correlations and a reduced magnetic entropy. Furthermore, density functional theory calculations demonstrate that the electrons near the Fermi surface mainly originate from the Te 5$p$ orbitals and the magnetism is dominated by localized electrons from the Eu 4$f$ orbitals. These results suggest that both the RKKY and Kondo interactions between the local moments and itinerant electrons play crucial roles in the magnetism and large negative magnetoresistance of EuTe${}_2$.

arXiv comment7 pages, 6 figures

References in corpus (7)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Metamagnetic Transition in Na${}_{0.85}$CoO${}_2$ Single Crystals
• Transport, Thermal, and Magnetic Properties of the Narrow-Gap Semiconductor CrSb2
• Metamagnetic transition in Ca${}_{1-x}$Sr${}_x$Co${}_2$As${}_2$($x$ = 0 and 0.1) single crystals
• A second-order spin-flop transition in collinear two-sublattice antiferromagnets
• Layered semiconductor EuTe 4 with charge density wave order in square tellurium sheets
• SDW transition of Fe1 zigzag chains and metamagnetic transition of Fe2 in TaFe${}_{1+y}$Te${}_3$

Cited by in corpus (16)

• Control of chiral orbital currents in a colossal magnetoresistance material
• Spin and orbital transport in rare earth dichalcogenides: The case of EuS${}_2$
• Colossal negative magnetoresistance in the complex charge density wave regime of an antiferromagnetic Dirac semimetal
• Synthesis and Properties of La${}_{1-x}$Sr${}_x$NiO${}_3$ and La${}_{1-x}$Sr${}_x$NiO${}_2$
• Phase transitions associated with magnetic-field induced topological orbital momenta in a non-collinear antiferromagnet
• Large Negative Magnetoresistance in Antiferromagnetic Gd2Se3
• Thermal hysteretic behavior and negative magnetoresistance in an unusual charge-density-wave material EuTe4
• Insulator-to-Metal Transition and Isotropic Gigantic Magnetoresistance in Layered Magnetic Semiconductors
• Anisotropic magnetotransport properties coupled with spiral spin modulation in a triangular-lattice magnet EuZnGe
• Large Negative Magnetoresistance in off-Stochiometric Topological Material PrSbTe
• Crystal and electronic structure of a quasi-two-dimensional semiconductor Mg${}_3$Si${}_2$Te${}_6$
• Gap and magnetic engineering via doping and pressure in tuning the colossal magnetoresistance in (Mn${}_{1-x}$Mg${}_x$)${}_3$Si${}_2$Te${}_6$
• Impact of Thermal Effects on the Current-Tunable Electrical Transport in the Ferrimagnetic Semiconductor Mn${}_3$Si${}_2$Te${}_6$
• Magnetic properties and enhanced magnetocaloric effect in EuAl${}_3$Si single crystals
• Enhanced thermopower in a magnetic semiconductor EuTe4 with multiple charge-density-wave instabilities/
• Chalcogen Doping Effect on the Insulator-to-Metal Transition in GdPS