Antiferromagnetism in Cu(NH_3)_4SO_4 ・H_2O

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概要

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• The magnetic structure of the magnetic linear chain substance, Cu(NH_3)_4・SO_4・H_2O, has been investigated by means of proton nuclear magnetic resonance and magnetic susceptibility measurements. A transition from the short range (or intra-chain) ordered state to the long range ordered state was found at 0.43±0.01°K in both measurements. The magnetic spin arrangement inferred from the rotation studies of the proton N.M.R. is nearly antiferromagnetic in a -O-Cu-O-Cu-O- chain, and nearly parallel to the c-axis. It is plausible that spins cant be few degrees from the direction parallel to the c-axis. This spin structure is inconsistent with the previous magnetic susceptibility data by Haseda and Miedema. Therefore, susceptibility measurements have been repeated taking care of the thermal equilibrium between the sample and the cooling agent in the temperature region between 4.25 and 0.03°K, and the results different from their work have been obtained, which are not inconsistent with the spin structure inferred from the proton N.M.R.

• 東北大学の論文

著者

• Saito Shinhachiro

  The Research Institute For Iron Steel And Other Metals

• Saito Shinhachiro

  The Research Institute For Ieon Steel And Other Metals Tohoku University

関連論文

• Proton Nuclear Magnetic Resonance in Cu(NH_3)_4SO_4・H_2O at Very Low Temperatures
• Antiferromagnetism in Cu(NH_3)_4SO_4 ・H_2O
• Antiferromagnetism in Cu(NH_3)_4SO_4・H_2O

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