Takayuki Tajiri
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View article: Effects of severe shear strain and hydrostatic compression on the crystal structure and magnetism and of manganese oxide Mn3O4
Effects of severe shear strain and hydrostatic compression on the crystal structure and magnetism and of manganese oxide Mn3O4 Open
The effects of severe shear strain and hydrostatic compression on the magnetostructural correlation of manganese oxide Mn3O4 were investigated using magnetic measurements and x-ray diffraction analyses. Hydrostatic pressures up to PHP = 4 …
View article: Creation of hyperoxia superconducting phase in La2CuO4 by applying shear strain under high-pressure compression
Creation of hyperoxia superconducting phase in La2CuO4 by applying shear strain under high-pressure compression Open
We successfully stabilized the hyperoxia superconducting phase of La2CuO4, the parent insulating compound of La-based cuprate superconductors, by applying compression under high pressure and successive shear strains via the process of high…
View article: Magnetostriction related to skyrmion-lattice formation in chiral magnet FeGe
Magnetostriction related to skyrmion-lattice formation in chiral magnet FeGe Open
The B20 type chiral magnet FeGe exhibits the formation of skyrmion-lattice (SkL) phases in the vicinity of the magnetic ordering temperature. The SkL is a magnetic superlattice composed of vortex-type topological spin objects, and it has e…
View article: Superconductivity of barium with highest transition temperatures in metallic materials at ambient pressure
Superconductivity of barium with highest transition temperatures in metallic materials at ambient pressure Open
View article: Bismuth titanate ferroelectric nanofilms formed directly on Si(100) substrates for memory application
Bismuth titanate ferroelectric nanofilms formed directly on Si(100) substrates for memory application Open
To realize ultrasmall ferroelectric-gate transistor memory, we have focused on nanometer—thick lanthanum—substituted bismuth titanate (BLT: Bi 4− x La x Ti 3 O 12 ) and developed the processes to form BLT thin films directly on Si(100) sub…
View article: Hydrostatic contraction and anisotropic contraction effects on oxygen molecule nanorods
Hydrostatic contraction and anisotropic contraction effects on oxygen molecule nanorods Open
View article: Strong suppression of Curie temperature of spin-polarized ferromagnet La1−<i>x</i>Sr<i>x</i>MnO3 by application of dynamic strain
Strong suppression of Curie temperature of spin-polarized ferromagnet La1−<i>x</i>Sr<i>x</i>MnO3 by application of dynamic strain Open
The ferromagnetic state of the spin-polarized ferromagnet La1−xSrxMnO3 is stabilized in the metallic region by strong coupling between localized spins in the t2g orbital and conduction electrons in the eg orbital. We prepared polycrystalli…
View article: Crystal structure of high-density Fe56 cluster Nd2Fe14B under high pressure
Crystal structure of high-density Fe56 cluster Nd2Fe14B under high pressure Open
View article: Hydrostatic Compression Effects on Fifth-Group Element Superconductors V, Nb, and Ta Subjected to High-Pressure Torsion
Hydrostatic Compression Effects on Fifth-Group Element Superconductors V, Nb, and Ta Subjected to High-Pressure Torsion Open
In fifth-group element superconductors V, Nb, and Ta, the increase in superconducting transition temperature (Tc) was attempted by using both high-pressure torsion (HPT) and additional hydrostatic pressure (HP) compression. The former brin…
View article: Hydrostatic pressure effects on superconducting transition of nanostructured niobium highly strained by high-pressure torsion
Hydrostatic pressure effects on superconducting transition of nanostructured niobium highly strained by high-pressure torsion Open
We study the effects of hydrostatic pressure (HP) compression on the superconducting transition of severely strained Nb samples, whose grain sizes are reduced to the submicrometer level. Engineered granularity by high-pressure torsion (HPT…
View article: Effect of size on the magnetic properties and crystal structure of magnetically frustrated <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">DyMn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:math> nanoparticles
Effect of size on the magnetic properties and crystal structure of magnetically frustrated nanoparticles Open
We synthesized magnetically frustrated DyMn2O5 nanoparticles in pores of mesoporous silica, with particle sizes ranging from 7 to 20 nm, and investigated their magnetostructural correlation. We found that the lattice constants of the DyMn2…
View article: Contactless measurement of electrical conductivity for bulk nanostructured silver prepared by high-pressure torsion: A study of the dissipation process of giant strain
Contactless measurement of electrical conductivity for bulk nanostructured silver prepared by high-pressure torsion: A study of the dissipation process of giant strain Open
We measured the electrical conductivity of bulk nanostructured silver prepared by high-pressure torsion (HPT) in a contactless manner by observing the AC magnetic susceptibility resulting from the eddy current, so that we could quantitativ…
View article: Crystal Structure and Magnetic Property on Magnetic Nanoparticles Synthesized in Mesoporous Silica
Crystal Structure and Magnetic Property on Magnetic Nanoparticles Synthesized in Mesoporous Silica Open
We synthesized NiO nanoparticles with particle sizes ranging from about 2 to 22 nm in the pores of mesoporous silica and investigated their crystal structure and magnetic properties. The mesoporous silica was used as a template to equalize…
View article: High pressure effects on isotropic Nd2Fe14B magnet accompanying change in coercive field
High pressure effects on isotropic Nd2Fe14B magnet accompanying change in coercive field Open
We investigated the effects of hydrostatic pressure on an isotropic Nd2Fe14B magnet (the exact chemical formula is Nd2.0Fe14.1B) consisting of nanocrystals, with the size of approximately 30 nm, by magnetization measurements at pressures (…
View article: Investigation of structural changes in chiral magnet Cr1∕3NbS2 under application of pressure
Investigation of structural changes in chiral magnet Cr1∕3NbS2 under application of pressure Open
We perform structural analysis experiments on the chiral magnet Cr1∕3NbS2, in which Cr3+ ions are inserted between hexagonal NbS2 layers. The noncentrosymmetrical nature of the inserted Cr3+ appears as a distorted CrS6 octahedron. Under th…
View article: Magnetic properties of Hagi ware
Magnetic properties of Hagi ware Open
Hagi ware originally consists of a mixture of two raw materials: Daido clay and Mishima clay. During its firing process, we observed a change in the magnetic properties of the iron oxide, Fe2O3. The magnetic moment of the Daido clay (which…
View article: Magnetic Properties and Crystal Structure of DyMn2O5 Nanoparticles Embedded in Mesoporous Silica
Magnetic Properties and Crystal Structure of DyMn2O5 Nanoparticles Embedded in Mesoporous Silica Open
We synthesized DyMn2O5 nanoparticles with the nanometer size using mesoporous silica as template of nanoparticles. The size effects of the DyMn2O5 nanoparticles were investigated through crystal structure analysis and magnetic measurement.…
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