Journal
MATERIALS LETTERS
Volume 198, Issue -, Pages 110-113Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2017.04.007
Keywords
Magnetic material; Phase transformation
Funding
- National Basic Research Program of China (973 program) [2016YFA0300701]
- National Natural Science Foundation of China [51471111, 11174351, 11274360]
- General program of science and technology development project of Beijing Municipal Education Commission [KM201410028005]
- Beijing Excellent talent training support [2012D005016000002]
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We have investigated the magnetic properties and magnetocaloric effects (MCEs) of R2Mo2O7 (R = Er, Dy, Gd and Y). Magnetic ground states of R2Mo2O7 largely depend on the radius of rare earth ion. Er2Mo2O7, Dy2Mo2O7 and Y2Mo2O7 with small rare earth radius exhibit spin-glass state around 20 K, while Gd2Mo2O7 with larger rare earth radius undergoes a ferromagnetic state below 78 K and a reentrant spin-glass behavior below 34 K. Magnetic phase transition leads to magnetocaloric effect. In particular, a natural table-like -Delta S-M and a very large refrigerant capacity (RC) value of 94.4 J/kg was observed in a field change of 0-10.5 kOe for Gd2Mo2O7 due to two successive magnetic transitions at similar to 78 and similar to 10 K. These notable magnetocaloric properties make the Gd2Mo2O7 a potential candidate for lowfield Ericsson-cycle magnetic refrigeration in the low temperature range. (C) 2017 Elsevier B.V. All rights reserved.
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