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Magnetic torque and heat capacity measurements on TPP[Fe(Pc)(CN)2]2

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Title: Magnetic torque and heat capacity measurements on TPP[Fe(Pc)(CN)2]2
Authors: Tajima, Hiroyuki Browse this author
Yoshida, Gosuke Browse this author
Matsuda, Masaki Browse this author
Nara, Kazumi Browse this author
Kajita, Koji Browse this author
Nishio, Yutaka Browse this author
Hanasaki, Noriaki Browse this author
Naito, Toshio Browse this author →KAKEN DB
Inabe, Tamotsu Browse this author
Keywords: PACS=75.50.Xx
Issue Date: 1-Aug-2008
Publisher: American Physical Society
Journal Title: Physical Review. B, Condensed Matter and Materials Physics
Volume: 78
Issue: 6
Start Page: 064424
Publisher DOI: 10.1103/PhysRevB.78.064424
Abstract: Magnetic torque and heat capacity measurements on TPP[Fe(Pc)(CN)2]2 are reported. The torque curves for the magnetic field rotated within the ab plane have a fourfold symmetry, exhibiting inversions around 13 and 27K. The heat capacity exhibits a broad peak around T=16.5K. By applying the magnetic field along the c axis, the maximum value of the heat capacity is enhanced below 20K. These results, as well as the magnetic susceptibility, were analyzed by employing a numerical calculation based on the anisotropic Heisenberg model in one dimension. The analyses revealed that: (i) the peak in the magnetic-susceptibility data around 25K is due to an antiferromagnetic short-range order (SRO) formation associated with d electrons, and (ii) π electrons fall into an antiferromagnetic state below 13K. The spin-flop field of π electrons is approximately 80kOe at 9K.
Rights: ©2008 The American Physical Society
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 稲辺 保

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