The magnetic phase diagram of Ca1−xSrxCo2As2 single crystals
Hefei National Laboratory for Physical Science at Microscale and Department of Physics, University of Science and Technology of China - Hefei, Anhui 230026, PRC
Received: 24 September 2013
Accepted: 16 December 2013
We reported the magnetic phase diagram of the Ca1−xSrxCo2As2 system by measuring the transport and magnetic properties of the single crystals. Its ground state evolves from A-type antiferromagnetism (AFM) with large anisotropy for CaCo2As2to ferromagnetism with spins aligned along the c-axis for Ca0.8Sr0.2Co2As2. With further increasing the Sr content, the system would become AFM again but with spins aligned within the ab-plane. For the Sr content above 0.4, the system shows no magnetic order and changes to uncollapsed tetragonal phase. Our results indicate that the magnetic properties in this system are strongly correlated with the interlayer spacing.
PACS: 75.30.-m – Intrinsic properties of magnetically ordered materials / 75.30.Gw – Magnetic anisotropy
© EPLA, 2013