Results 171 to 180 of about 6,215 (212)

Effective Nuclear Spin Hamiltonian for Electronic Singlet Ground State System

open access: closedJournal of the Physical Society of Japan, 1975
Along the same line as in the previous paper, an effective nuclear spin Hamiltonian is derived for the system where magnetic ions have the electronic singlet ground state and are interacting each other by the exchange interaction. All crystal-field levels of electrons are taken into account so that the Hamiltonian can be used for any realistic case in ...
Tsuyoshi Murao
openalex   +2 more sources

Nuclear magnetic resonance in high magnetic fields: Study of singlet-ground-state due to 1-D quantum spin effect

open access: closedPhysica B: Condensed Matter, 1996
Abstract In one-dimensional (1-D) magnets the singlet-ground-state (SGS) due to the quantum spin effect is one of the most interesting phenomena. The temperature and the field dependences of the proton spin-lattice relaxation under magnetic fields up to 15 T have been observed for SGS materials, namely, NENP (Haldane system) and CuCI2(γ-picoline)2 ...
Meiro Chiba   +3 more
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Effective Nuclear Spin Hamiltonian for Magnetically Ordered Singlet Ground State System

open access: closedJournal of the Physical Society of Japan, 1979
The effective nuclear spin Hamiltonian is derived for the system where magnetic ions have the electronic singlet ground state and are in a magnetically ordered state. As in the nuclear regime, the effective Hamiltonian involves the I - I coupling, the pseudo-nuclear quadrupole interaction, the pseudo-nuclear Zeeman energy, which are all exchange ...
Tsuyoshi Murao
openalex   +2 more sources

Effect of spin correlation on133Cs nuclear magnetic relaxation in singlet ground state system CsFeCl3

open access: closedCzechoslovak Journal of Physics, 1996
To study spin correlation in singlet ground state system CsFeCl3, we have measured the temperature dependence of the nuclear spin lattice relaxation timeT 1 of133Cs in the field range up to the critical field 7.5T (H//c-axis). In low fieldsT 1 −1 exhibits remarkable ...
Mitsuru Toda   +4 more
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Trimer V3+ Spin Singlet State and Pseudo Gap in LiVS2 Studied by 51V and 7Li Nuclear Magnetic Resonance

open access: closedJournal of the Physical Society of Japan, 2009
To clarify the electronic state in a two-dimensional triangular lattice LiVS 2 , we have performed 51 V- and 7 Li-NMR measurements. Below the phase transition temperature T c of about 310 K from the paramagnetic state to a nonmagnetic state, the Knight shift of both 51 V and 7 Li does not depend on temperature. The 51 V and 7 Li spin–lattice relaxation
Tetsu Tanaka   +9 more
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133Cs nuclear spin?lattice relaxation on field-induced two-step phase transition in singlet-ground-state antiferromagnet CsFeBr3

open access: closedPhysica B: Condensed Matter, 2003
Abstract In order to study the spin dynamics associated with the field-induced two-step phase transition, we have performed an NMR experiment on 133 Cs in CsFeBr3 under magnetic fields applied along the c-axis. The phase transition temperatures TN1 and TN2 were determined from the anomalies in the temperature dependence of the nuclear spin–
Tsuyoshi Nakamura
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Spin-Echo Studies of 141Pr Nuclear Relaxation in a Singlet Ground State System Pr1-xLaxIn3

open access: closedJournal of the Physical Society of Japan, 1981
The spin-echo signal of 141 Pr has been observed for the frst time in Pr 1- x La x In 3 where Pr ions are in singlet ground states. The spin-lattice ( T 1 ) and spin-spin ( T 2 ) relaxation times of 141 Pr have been studied at liquid helium temperatures as functions of temperature and composition x . T 1 is inversely proportional to temperature and T 1
Kōzō Satoh   +4 more
openalex   +2 more sources

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