Slow Magnetic Relaxation in a Mononuclear Ruthenium(III) Complex

• Published in: Chemistry : a European journal Vol. 23; no. 42; pp. 10028 - 10033
• Main Authors: Wu, Shu‐Qi, Miyazaki, Yuji, Nakano, Motohiro, Su, Sheng‐Qun, Yao, Zi‐Shuo, Kou, Hui‐Zhong, Sato, Osamu
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 26.07.2017
• Subjects: Chemistry; Crystal structure; Electric currents; Frozen ground; Magnetic induction; Magnetic relaxation; Magnetic studies; magnetism; Relaxation time; Ruthenium; Specific heat; spin-phonon interaction; magnetism; ruthenium; spin-phonon interaction
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.201702047

The development of magnetic molecules with long spin reversal/decoherence times highly depends on the understanding of relaxation behavior under different external conditions. Herein, a magnetic study on a RuIII complex (1) is presented. Detailed analysis of the relaxation time and the magneto‐heat capacity data suggests that the resonant phonon trapping process dominates the magnetic relaxation in the crystalline sample of 1, slowing down the spin relaxation rate, as further confirmed by the measurements on a ground sample and frozen solution. Thus, it provides a rare example showing that 4d metal‐centered mononuclear compounds without second‐order anisotropy can display slow magnetic relaxation. Relax! The magnetic relaxation behavior of a ruthenium(III) complex (1) has been characterized in detail. The analysis suggests that resonant phonon trapping dominates the relaxation process in the low temperature region, slowing down the relaxation rate.