The Magnetic Properties of Cupric Formate Tetrahydrate at Low Temperatures

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概要

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• The magnetic susceptibility of single crystals of Cu(HCO_2)_2・4H_2O was measured at temperatures between 1.4°K and 80°K by a, c. bridge and magnetic balance method. This salt is an example of the magnetic two dimensional lattice. The interaction between Cu^<2+> ions is mainly the superexchange interaction through a formate ion in the same layer. From the Weiss constant of about -150°K, it is concluded that strength of superexchange interaction through a formate molecule, -(O-CH-O)-, has the same order as that through one diamagnetic atomic ion such as -(Cl)-. The existence of a broad maximum of the susceptibility at about 60'K implies the appearence of short range order in the two dimensional lattice. The antiferromagnetic transition accompanied by parasitic ferromagnetism was found at 17.0°K±0.2°K. The weak ferromagnetic moment in L_1L_2 plane was about 150 c. g. s. e. m.u. at 0°K. Along L_3 axis, no ferromagnetic moment was found. The susceptibility of isomorphous Cu(HCO_2)_2・2H_2O・2(NH_2)_2CO was similar to that of Cu(HCO_2)_2・4H_2O.

• 社団法人日本物理学会の論文
• 1963-04-05

著者

• Kobayashi Hanako

  The Research Institute For Iron Steel And Other Metals Tohoku University

• Haseda Taiichiro

  The Research Institute For Iron Steel And Other Metals

• Kobayashi H.

  The Research Institute for Iron, Steel and Other Metals

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• Some Behaviours of Supercooled Liquid at Low Temperatures
• Studies on the Linear Antiferromagnets : Magnetic Susceptibilities of Cupric Quinone Complex Salts at Low Temperatures
• The Paramagnetic Susceptibility of Some Nickel Salts
• Paramagnetic Susceptibility of CoCl_2・6H_2O between 290゜K-1.52゜K
• Magnetization of Linear Chain Antiferromagnet; Cu(NH_3)_4SO_4H_2O
• The Magnetic Properties of Cupric Formate Tetrapydrate at Low Temperatures
• Paramagnetic Susceptibility of CoCl_2・6H_2O and its Deuterated Salts
• Studies on the Linear Antiferromagnets : Magnetic Susceptibilities of Cupric Quinone Complex Salts at Low Temperatures
• The Magnetic Properties of Cupric Formate Tetrahydrate at Low Temperatures

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