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Article
Development of Pressure Calibration Method in High-Pressure THz ESR System
We have developed a pressure calibration method in the high-pressure THz ESR system using induction coils set outside the pressure cell. The pressure is calibrated using alternating current (AC) magnetization ...
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Article
Open AccessContinuous control of classical-quantum crossover by external high pressure in the coupled chain compound CsCuCl3
In solid materials, the parameters relevant to quantum effects, such as the spin quantum number, are basically determined and fixed at the chemical synthesis, which makes it challenging to control the amount o...
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Article
THz ESR Study of Peculiar Co Pyrochlore System GeCo2O4 Using Pulsed High Magnetic Field
THz electron spin resonance (ESR) measurements of the spinel compound GeCo2O4, which consists of the Co2+ pyrochlore structure, were performed. The temperature dependence measurements revealed new antiferromagnet...
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Article
Zero-Field Splitting Parameters of Hemin Investigated by High-Frequency and High-Pressure Electron Paramagnetic Resonance Spectroscopy
We systematically studied the zero-field splitting (ZFS) parameters of Fe(III) protoporphyrin IX chloride, or hemin, using the terahertz electron paramagnetic resonance (EPR) spectroscopy technique at ambient ...
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Article
Development of High-Field and High-Pressure ESR System and Application to Triangular Antiferromagnet \(\hbox {CsCuCl}_{3}\)
We have developed a new hybrid-type pressure cell for the high-pressure and high-field electron spin resonance (ESR) measurement using a widely used Oxford 15 T superconducting magnet with the variable tempera...
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Article
Possible Singlet--Triplet Transition of ESR in the Kagome-Lattice Antiferromagnet
The S = 1/2 kagome-lattice antiferromagnet is investigated by the numerical diagonalization of 18-spin finite-size cluster. The matrix elements proportional to the intensity of the singlet--triplet electron spin ...
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Article
Development of High-Pressure and Multi-Frequency ESR System and Its Application to Quantum Spin System
We have developed a high-pressure and multi-frequency electron spin resonance (ESR) system in the submillimeter wave region. The pressure is generated by the piston–cylinder pressure cell whose inner parts are...
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Article
High-field ESR Measurements of YCrO3
High-field electron spin resonance measurements of perovskite compound YCrO3 powder have been performed to obtain the magnetic anisotropy. Isotropic absorption lines of electron paramagnetic resonance, which can ...
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Article
Development of High-Pressure ESR System Using Micro-coil
We have developed the high-pressure electron spin resonance (ESR) system using a micro-coil in the frequency region up to around 2 GHz and potentially 10 GHz. The hybrid-type piston-cylinder pressure cell whos...
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Chapter and Conference Paper
A Review of Peirce Decomposition for Unitary \((-1,-1)\) -Freudenthal Kantor Triple Systems
In this paper we discuss a Peirce decomposition for unitary \((-1,-1)\) -Freudenthal Kantor triple systems.
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Article
Development of Hybrid-Type Pressure Cell for High-Pressure and High-Field ESR Measurement
A hybrid-type piston-cylinder pressure cell for the electron spin resonance (ESR) measurement has been developed. The cylinder of this pressure cell consists of a NiCrAl inner cylinder and a CuBe outer sleeve,...
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Article
Nonmagnetic impurity effect of the S = 1/2 spin ladder system (pipdH)2Cu1−x Zn x Br4
We report the synthesis and the magnetic susceptibility of (pipdH)2Cu1−x Zn x Br4 (pipd=piperidinium), which is a nonmagnetic impurity-doped S = 1/2 spin ...
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Article
High-Frequency ESR Measurements of S = 1/2 1-D Heisenberg Antiferromagnetic Zig-Zag Chain (VO)(SO4)(2,2-bpy)
High-frequency electron spin resonance (ESR) measurements of S = 1/2 one-dimensional Heisenberg antiferromagnetic zig-zag chain substance (VO)(SO4)(2,2-bpy) were performed in the temperature region from 1.8 to 26...
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Article
Analysis of the temperature dependence of the high-frequency EMR spectra of Mn ions in the lithium-ion battery material LiMn2O4
This paper deals with the analysis of the temperature dependence of high-frequency EMR (HF-EMR) spectra due to Mn3+ and Mn4+ ions in the lithium manganese spinel LiMn2O4. A range of powder samples obtained by the...
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Article
Composition Triple Systems and Realization of Triple Products in Terms of Bilinear Algebras
We give a definition of new triple systems and study the correspondence between triple and bilinear products for many triple systems.
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Article
A construction of simple Jordan superalgebra of F type from a Jordan–Lie triple system
We study in this paper a construction of simple Jordan superalgebras from certain triple systems, in particular, we investigate F type from a Jordan–Lie triple system minutely.
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Article
High Field ESR System and Its Application to the Study of Quantum Spin Systems
Developments of the high field ESR system in Kobe University is presented. Using Gunn oscillators and backward traveling oscillators (BWO), we can cover the frequency region from 30 to 1183.6 GHz with the use ...
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Article
On algebras satisfying $x^2x^2=N(x)x$
The commutative algebras satisfying the “adjoint identity”: \(x^2x^2\) \(=N(x)x\) , where N is a cubic form, are show...
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Article
Eigenvalue problem for symmetric 3×3 octonionic matrix
The eigenvalue problem of symmetric 3×3 octonionic matrix has been analyzed. We have especially proved explicitly first that octonionic eigenfunctions have six independent solutions in general with four degene...
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Article
On classical Yang-Baxter equations associated with Freudenthal-Kantor triple systems
A modified classical Yang-Baxter equation has been studied ??? triple product form and its relevance to well-known Freudenthal-Kantor triple systems is discussed with some examples.
