US EPA

4788532 

Journal Article 

Hydrothermal syntheses and low temperature magnetic behaviors of ACo(3)(P2O7)(2) (A=Ca, Sr, Ba, Pb) 

Yang, Tao; Lin, J 

2013 

Yes 

Journal of Solid State Chemistry
ISSN: 0022-4596
EISSN: 1095-726X 

ACADEMIC PRESS INC ELSEVIER SCIENCE 

SAN DIEGO 

198 

1-5 

10.1016/j.jssc.2012.09.035 

WOS:000314320800001 

ACO(3)(P2O7)(2) (A=Ca, Sr, Ba, Pb) has been synthesized hydrothermally. Dc and ac magnetic susceptibilities are measured at various conditions. The magnetic interactions in all four compounds are dominantly ferromagnetic. All four compounds has a ferromagnetic-like long-range ordering at 8.0 K for CaCo, 6.4 K for SrCo, 7.6 K for PbCo, 8.0 K for BaCo. The ordering of PbCo at 7.6 K may contain a glassy component. Moreover, there is an additional phase transition for PbCo at 3.6 K. Once enhancing the external field to 3 kOe, the second phase transition is suppressed. Isothermal magnetizations of SrCo, PbCo and BaCo are quite similar, showing a field-induced metamagnetic transition at 2 K. For PbCo, the low-field ground state is weak ferromagnetic, and the critical filed is 10 kOe. Differently, CaCo is a typical soft weak ferromagnet. (c) 2012 Elsevier Inc. All rights reserved. 

Cobalt; Phosphate; Low temperature; Magnetic