Abstract
We have synthesized the high-pressure form of CrSb2 with CuAl2-type structure under 7 GPa and 700 °C, and characterized its structural, transport, and magnetic properties by a suite of measurement techniques over a broad range of temperature, magnetic field, and pressure. In addition to previously reported ferromagnetic (FM) transition at TC≈160 K, we discover another antiferromagnetic spin-density-wave (SDW) transition at Ts≈90 K, which is characterized by FM sheets of spins in the ab plane that vary along the c axis as determined by neutron powered diffraction. Pronounced anomalies around these two magnetic transitions are visible only in the lattice parameter c, signaling a strong spin-lattice coupling along the -Cr-Cr-Cr- infinite linear chain. We find that the application of magnetic field can suppress the SDW phase and stabilize the FM state down to the lowest temperature above μ0Hc≈3 T, around which a peculiar non-Fermi-liquid behavior with reduced effective mass emerges. On the other hand, the application of high pressure induces complex evolution of the magnetic states, i.e., the FM order is lowered while the SDW order is enhanced quickly until they merge together into a single antiferromagnetic transition, which is suppressed completely at Pc≈9 GPa. We observe near Pc non-Fermi-liquid behavior and enhancement of effective mass, which indicates the possible occurrence of magnetic quantum critical point. No superconductivity was observed down to 2 K around Pc.
| Original language | English |
|---|---|
| Article number | 074404 |
| Journal | Physical Review Materials |
| Volume | 3 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 11 2019 |
Funding
This work is supported by the National Key R&D Program of China (Grants No. 2018YFA0305700 and No. 2018YFA0305800), the National Natural Science Foundation of China (Grants No. 11574377, No. 11888101, No. 11834016, and No. 11874400), the Strategic Priority Research Program and Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (Grants No. XDB25000000 and No. QYZDB-SSW-SLH013). A portion of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. M.A.M., J.Q.Y., and B.C.S. were supported at the Oak Ridge National Laboratory by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. Y.Y.J. and J.P.S. acknowledge support from the China Postdoctoral Science Foundation and the Postdoctoral Innovative Talent program.