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3. Nuclear Spin Driven Quantum Tunneling of Magnetization in a New Lanthanide Single-Molecule Magnet: Bis(phthalocyaninato)holmium anion

Author

Ishikawa, N., Sugita, M., and Wernsdorfer, W.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Abstract

The first measurements of magnetization hysteresis loops on diluted single crystal of [(Pc)2Ho]-TBA+ (Pc: phthalocyaninato, TBA: tetrabutylammonium) in the subkelvin temperature range are reported. Characteristic staircase-like structure was observed, indicating the occurrence of the quantum tunneling of magnetization (QTM), which is a characteristic feature of SMMs. The quantum process in the new lanthanide SMMs is due to resonant quantum tunneling between entangled states of the electronic and nuclear spin systems, which is an essentially different mechanism from those of the known transition-metal-cluster SMMs. Evidence of the two-body quantum process was also observed for the first time in lanthanide complex systems., Comment: Received November 26, 2004; Published on Web February 23, 2005

Published
2005
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4. Quantum tunneling of magnetization in lanthanide single-molecule magnets, bis(phthalocyaninato)terbium and bis(phthalocyaninato)-dysprosium anions

Author

Ishikawa, N., Sugita, M., and Wernsdorfer, W.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Abstract

Magnetization versus field measurements were performed on single crystals of [(Pc)2TbIII0.02YIII0.98]^TBA+ and [(Pc)2DyIII0.02YIII0.98]^TBA+ (Pc: phthalocyaninato, TBA: tetrabutylammonium) at 0.04 K. The [(Pc)2TbIII] complex, the first lanthanide single-molecule magnet, exhibited clear staircase-like structures, which are assigned to resonant quantum tunneling between entangled states of the electron and nuclear spin systems., Comment: Received: November 17, 2004, Revised: February 15, 2005; Published online: April, 2005

Published
2005
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5. Quadrupole Deformation of Barium Isotopes

Author

Sugita, M., Uchiyama, K., and Furuno, K.

Subjects
Nuclear Theory
Abstract

The B(E2:0_1^+ -> 2_1^+) values of the Ba isotopes (Z=56) exhibit a sharp increase in deformation as the neutron numbers approach the mid-shell value of N=66. This behavior is anomalous because the 2_1^+ level energies are very similar to those of the neighboring isotopes. By means of the axially-symmetric deformed Woods-Saxon (WS) hamiltonian plus the BCS method, we investigated the systematics of B(E2) of the Ba isotopes. We showed that 15% of the B(E2) values at N=66 was due to the level crossing, occurring at the deformation with beta being nearly 0.3, between the proton orbits originating from the orbits Omega=1/2^-(h11/2) and 9/2^+(g9/2) at zero deformation. The latter of these two was an intruder orbit originating from below the energy gap at Z=50, rising higher in energy with the deformation and intruding the Z=50-82 shell. These two orbits have the largest magnitude of the quadrupole moment with a different sign among the orbits near and below the Fermi surface. Occupancy and non-occupancy of these orbits by protons thus affect B(E2:0_1^+ -> 2_1^+) significantly., Comment: 10 pages, 2 figures, to be published in Phys.Lett.B

Published
1998
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12. Effect of Clenching on Spinal Alignment in Normal Adults

Author

Takahashi M, Bando Y, Fukui T, Maruyama A, and Sugita M

Abstract

Purpose: Occlusion plays a role in the execution of physical abilities in various. The aim of this study was to clarify the effect of clenching on the spinal alignment.

Published
2022

13. Clinical experience treating Paecilomyces lilacinus keratitis in four patients

Author

Monden Y, Sugita M, Yamakawa R, and Nishimura K

Subjects
Ophthalmology, RE1-994
Abstract

Yu Monden,1 Minoru Sugita,1 Ryoji Yamakawa,1 Kazuko Nishimura,21Department of Ophthalmology, Kurume University School of Medicine, Kurume, Fukuoka, Japan; 2Medical Mycology Research Center, Chiba University and First Laboratories Co Ltd, Kawasaki, Kanagawa, JapanBackground: Paecilomyces lilacinus is a saprobic fungus that occasionally causes keratitis in infected patients. Voriconazole, a triazole antifungal agent, is often administered to treat P. lilacinus keratitis, because it is resistant to many antifungal agents. However, some patients may not require voriconazole. Here, we report our experience of treating this infection and compare outcomes between patients treated with or without voriconazole.Subjects: We retrospectively reviewed four cases of infectious keratitis caused by P. lilacinus and compared treatment course and outcomes among the four cases.Observations: P. lilacinus was isolated from corneal cultures in all four cases. Three cases developed corneal perforation and underwent keratoplasty. Voriconazole was given in two cases with severe and refractory infection. Both required long-term treatment despite the effectiveness of voriconazole. They also had a medical history of diabetes and corticosteroid therapy. In two cases that were not treated with voriconazole, the eye conditions improved with a short treatment period (2–3 weeks). Neither of these cases had a medical history of diabetes, nor had they used corticosteroids.Conclusion: Although voriconazole is the most useful antifungal agent for treating P. lilacinus keratitis, this infection can be resolved by other treatments. Voriconazole should be offered to patients with diabetes and/or prior corticosteroid use.Keywords: Paecilomyces lilacinus, voriconazole, diabetes, corticosteroids

Published
2012

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