TY - JOUR
T1 - H NMR study of dodecanuclear polyoxovanadate cluster {V12}
AU - Suh, B. J.
AU - Procissi, D.
AU - Kögerler, P.
AU - Micotti, E.
AU - Lascialfari, A.
AU - Borsa, F.
PY - 2004/5/1
Y1 - 2004/5/1
N2 - We report 1H nuclear spin-lattice relaxation rates T 1-1 in the magnetic cluster {V12}. While no critical enhancement in 1H T1-1 was found at T∼|J| contrary to other antiferromagnetic molecules, the T1ρ was observed to exhibit a peak at 19 K. The different behavior is discussed in terms of critical effects in classical spins (s = 5/2) vs. quantum spins (s = 1/2). From the exponential drop of the proton T1-1 at low T, we obtained the gap values between the ST = 0 ground state to the excited states: δ1 ≅ 17 K, δ2 ≅ 35 K, and δ3 ≅ 52K.
AB - We report 1H nuclear spin-lattice relaxation rates T 1-1 in the magnetic cluster {V12}. While no critical enhancement in 1H T1-1 was found at T∼|J| contrary to other antiferromagnetic molecules, the T1ρ was observed to exhibit a peak at 19 K. The different behavior is discussed in terms of critical effects in classical spins (s = 5/2) vs. quantum spins (s = 1/2). From the exponential drop of the proton T1-1 at low T, we obtained the gap values between the ST = 0 ground state to the excited states: δ1 ≅ 17 K, δ2 ≅ 35 K, and δ3 ≅ 52K.
KW - Molecular magnet
KW - Nuclear magnetic resonance
KW - Nuclear spin-lattice relaxation rate
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U2 - 10.1016/j.jmmm.2003.12.606
DO - 10.1016/j.jmmm.2003.12.606
M3 - Article
AN - SCOPUS:23144453682
SN - 0304-8853
VL - 272-276
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - SUPPL. 1
ER -