Magnetic and calorimetric studies on rare-earth iron borates LnFe3(BO3)4 (Ln=Y, La-Nd, Sm-Ho) |
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| Authors: | Yukio Hinatsu Yoshihiro Doi Makoto Wakeshima |
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| Affiliation: | a Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japanb Inorganic Synthesis Laboratory, Faculty of Chemistry, Tabriz University, Tabriz, Iran |
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| Abstract: | A series of rare-earth iron borates having general formula LnFe3(BO3)4 (Ln=Y, La-Nd, Sm-Ho) were prepared and their magnetic properties have been investigated by the magnetic susceptibility, specific heat, and 57Fe Mössbauer spectrum measurements. These borates show antiferromagnetic transitions at low temperatures and their magnetic transition temperatures increase with decreasing Ln3+ ionic radius from 22 K for LaFe3(BO3)4 to 40 K for TbFe3(BO3)4. In addition, X-ray diffraction, specific heat, and differential thermal analysis (DTA) measurements indicate that the phase transition occurs for the LnFe3(BO3)4 compounds with Ln=Eu-Ho, Y, and its transition temperature increases remarkably with decreasing Ln3+ ionic radius from 88 K for Ln=Eu to 445 K for Ln=Y. |
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| Keywords: | Magnetic properties Specific heat Rare-earth Borate Ion 57Fe Mö ssbauer Spectroscopy |
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