Spin-flop transition and magnetic phase diagram in CaCo$_{2}$As$_{2}$ revealed by torque measurements

TL;DR

This study investigates the magnetic phase transitions in CaCo$_{2}$As$_{2}$ single crystals using magnetization and torque measurements, revealing a spin-flop transition and constructing the magnetic phase diagram.

Contribution

It provides the first detailed magnetic phase diagram of CaCo$_{2}$As$_{2}$ based on systematic torque and magnetization measurements, highlighting the spin-flop transition.

Findings

Paramagnetic to antiferromagnetic transition at 74 K

Field-induced spin-flop transition below T_N for H parallel to c

Magnetic phase diagram of CaCo$_{2}$As$_{2}$ in H-T plane

Abstract

The magnetic properties of CaCo$_{2}$As$_{2}$ single crystal was systematically studied by using dc magnetization and magnetic torque measurements. A paramagnetic to antiferromagnetic transition occurs at $T_N$ = 74 K with Co spins being aligned parallel to the c axis. For $H \parallel c$, a field-induced spin-flop transition was observed below $T_N$ and a magnetic transition from antiferromagnetic to paramagnetic was inferred from the detailed analysis of magnetization and magnetic torque. Finally, we summarize the magnetic phase diagram of CaCo$_{2}$As$_{2}$ based on our results in the \emph{H-T} plane.