Magnetic diagnostics using the third-harmonic magnetic response for a molecule-based magnet networked by a single chiral ligand

• Mito, Masaki

• Iriguchi, K.

• Deguchi, Hiroyuki

• Kishine, Jun-Ichiro

• Yoshida, Yusuke

• Inoue, Katsuya

Abstract

We investigated complex magnetic domain formation on a chiral molecule-based magnet, [Cr(CN)6][Mn(R)-pnH(H2O)](H2O) (termed as R-GN), whose two-dimensional molecular network was constructed with the help of a single-handed chiral ligand ((R)-pn). There, the first- and third-harmonic magnetic responses (M1ω and M3ω) against the ac magnetic field were observed, and magnetic hysteresis in ac field of a few Oe was discussed in terms of Rayleigh loop. The diagnostics of this magnetic hysteresis clarified the complex process of magnetic domain formation against a change in temperature. For R-GN, it was reported that a giant M3ω (termed #4 in this paper) appeared just above the so-called “magnetic ordering temperature (TC)." In the present study, three M3ω responses (#1-3) were newly observed on the lower-temperature side of #4, and the ac field dependencies for all of #1-#4 were investigated. #1 also accompanied the giant M3ω, which suggests that a significant degree of magnetic fluctuation surviving below TC. This glassy behavior below TC is an attractive new phenomenon in molecule-based magnets with a single-handed chiral ligand. #2 and #3 exhibited magnetic ordering and the formation of a small magnetic domain, respectively. The M3ω responses of #1-3 were suppressed with increasing the amplitude of ac field, and the corresponding magnetic hysteresis was a normal Rayleigh loop accompanying the out-of-phase of the M1ω response. The M3ω response of #4 without the out-of-phase of M1ω was, however, enhanced with increasing the amplitude of ac field, and #4 represented a large magnetic hysteresis in the paramagnetic region, intrinsically different from those of #1-#3.

Journal

• Journal of Applied Physics

  Journal of Applied Physics 111 (10), 103914-, 2012

  American Institute of Physics

Keywords

• General Physics and Astronomy

Details

• CRID: 1050859215939150720
• NII Article ID: 120005198251
• NII Book ID: AA00693547
• DOI: 10.1063/1.4721806
• ISSN: 10897550
• ISSN: 00218979
• Web Site: http://ir.lib.hiroshima-u.ac.jp/00033950
• Web Site: https://pubs.aip.org/aip/jap/article-pdf/doi/10.1063/1.4721806/13053542/103914_1_online.pdf
• Text Lang: en
• Article Type: journal article
• Data Source:
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