Hydrothermal syntheses and low temperature magnetic behaviors of ACo{sub 3}(P{sub 2}O{sub 7}){sub 2} (A=Ca, Sr, Ba, Pb)
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044 (China)
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (China)
ACo{sub 3}(P{sub 2}O{sub 7}){sub 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. - Graphical abstract: Dc and ac magnetic susceptibilities were measured on ACo{sub 3}P{sub 4}O{sub 14} (A=Ca, Sr, Ba, Pb). At 2 K, PbCo{sub 3}P{sub 4}O{sub 14} is a field-induced metamagnet, while CaCo{sub 3}P{sub 4}O{sub 14} is a soft ferromagnet. Highlights: Black-Right-Pointing-Pointer Pure ACo{sub 3}(P{sub 2}O{sub 7}){sub 2} (A=Ca, Sr, Ba, Pb) samples are hydrothermally prepared. Black-Right-Pointing-Pointer Dc and ac magnetic data shows they all have a FM-like ordering at 6-8 K. Black-Right-Pointing-Pointer CaCo{sub 3}(P{sub 2}O{sub 7}){sub 2} is a typical soft ferromagnet. Black-Right-Pointing-Pointer PbCo{sub 3}(P{sub 2}O{sub 7}){sub 2} has a metamagnetic transition at 2 K with a critical field of 10 kOe.
- OSTI ID:
- 22149990
- Journal Information:
- Journal of Solid State Chemistry, Vol. 198; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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