Magnetocaloric effect and thermal conductivity of Gd(OH)3 and Gd2O(OH)4(H2O)2.
نویسندگان
چکیده
Magnetocaloric effect (MCE) and thermal conductivity of two gadolinium hydroxides, Gd(OH)3 (1) and Gd2O(OH)4(H2O)2 (2), are investigated. Magnetic studies indicate that both 1 and 2 exhibit antiferromagnetic interaction, and the MCE values for 1 and 2 at 2 K and ΔH = 7 T are 62.00 J kg(-1) K(-1) and 59.09 J kg(-1) K(-1), respectively. Investigation of their thermal conductivity reveals that the thermal conductivity for 1 is significantly better than that for 2.
منابع مشابه
Synthesis, structure, and magnetism of non-planar heptanuclear lanthanide(III) complexes.
The reaction of the hydrazone, 2-methoxy-6-(pyridin-2-yl-hydrazonomethyl) phenol (LH) with lanthanide(iii) nitrate salts in the presence of excess triethylamine afforded the heptanuclear Ln(iii) complexes: [Gd7(L)6(μ3-OH)8(NO3)4(H2O)]·(NO3)3·8CH3CN·H2O (), [Tb7(L)6(μ3-OH)8(NO3)4]·(NO3)3·9CH3CN·2CH3OH·3H2O (), [Dy7(L)6(μ3-OH)8(NO3)4(H2O)]·(NO3)3·7CH3CN·3H2O (), [Ho7(L)6(μ3-OH)8(NO3)4]·(NO3)3·11C...
متن کاملSynthesis, crystal structure and study of magnetocaloric effect and single molecular magnetic behaviour in discrete lanthanide complexes.
The synthesis, crystal structure and magnetic properties of four polynuclear lanthanide coordination complexes having molecular formulae, [Gd3(2)(1)L(H2O)8(Cl)](Cl)4·10H2O (1), [Dy3L(2)(1)(H2O)9](Cl)5·6H2O (2) [Gd6L(2)(2)(HCO2)4(μ3-OH)4(DMF)6(H2O)2](Cl)2·4H2O (3) and [Dy6L(2)(2)(HCO2)4(μ3-OH)4(DMF)6(H2O)2](Cl)2·4H2O (4) (where H2L(1) = bis[(2-pyridyl)methylene]pyridine-2,6-dicarbohydrazide and ...
متن کاملLarge magnetocaloric effect in a Wells-Dawson type {Ni6Gd6P6} cage.
Magnetic refrigeration is based on the magnetocaloric effect (MCE) which relies on the entropy change of a material when placed in a magnetic field.1 Molecular magnets have recently been examined in this context, especially high spin isotropic magnetic molecules.2-8 The very large MCE observed for some of these cages suggests they could be used as a replacement for helium-3 in some applications...
متن کاملThe importance of being exchanged: [Gd(III)4M(II)8(OH)8(L)8(O2CR)8]4+ clusters for magnetic refrigeration.
One of the most promising applications for molecules built from paramagnetic metal ions is low-temperature magnetic refrigeration. Indeed, recent studies have suggested that molecular coolers can outperform any conventionally employed solid-state refrigerant material by orders of magnitude. In order to do so, molecules must possess a combination of a large spin ground state (S), with negligible...
متن کاملA DFT study of uranyl hydroxyl complexes: structure and stability of trimers and tetramers
A DFT study of U(VI) hydroxy complexes was performed with special attention paid to the [(UO2)3(OH)5(H2O)4-7]+ and [(UO2)4(OH)7(H2O)5-8]+ species. It was established that the ionicity of the U=O bond increased when moving from [(UO2)(H2O)5]2+, [(UO2)2(OH)(H2O)8]3+, [(UO2)2(OH)2(H2O)6]2+, [(UO2)3(OH)5(H2O)4-6]+ to [(UO2)4(OH)7(H2O)5-8]+ species. In both [(UO2)3(OH)5(H2O)4-6]+ and [(UO2)4(OH)7(H2...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Chemical communications
دوره 51 34 شماره
صفحات -
تاریخ انتشار 2015