Abstract
The spin dynamics of a cluster of four iron(III) ions characterized by a total spin ground state S T=5 and Ising anisotropy have been investigated by the 1H nuclear magnetic resonance (NMR) linewidth and 1H NMR spin-lattice relaxation rate 1/T 1 as a function of the temperature (0.5-295 K) and external magnetic field (0.3-7.2 T). At very low T (0.5 K) the spectrum becomes very broad indicating freezing of the Fe 3+ moments in a superparamagnetic state. The temperature dependence of T 1 -1 and T 2 -1 shows strong field dependent enhancement below 50 K which must be related to the spin dynamics of the Fe 3+ moment freezing process, although no quantitative theory of this is currently available.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 7173-7175 |
| Number of pages | 3 |
| Journal | Journal of Applied Physics |
| Volume | 91 |
| Issue number | 10 I |
| DOIs | |
| State | Published - May 15 2002 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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1H nuclear magnetic resonance and spin dynamics in the tetranuclear iron(III) cluster Fe 4 . / Procissi, D.; Suh, B. J.; Lascialfari, A.; Borsa, F.; Caneschi, A.; Cornia, A.
In: Journal of Applied Physics, Vol. 91, No. 10 I, 15.05.2002, p. 7173-7175.Research output: Contribution to journal › Article
TY - JOUR
T1 - 1H nuclear magnetic resonance and spin dynamics in the tetranuclear iron(III) cluster Fe 4
AU - Procissi, D.
AU - Suh, B. J.
AU - Lascialfari, A.
AU - Borsa, F.
AU - Caneschi, A.
AU - Cornia, A.
PY - 2002/5/15
Y1 - 2002/5/15
N2 - The spin dynamics of a cluster of four iron(III) ions characterized by a total spin ground state S T=5 and Ising anisotropy have been investigated by the 1H nuclear magnetic resonance (NMR) linewidth and 1H NMR spin-lattice relaxation rate 1/T 1 as a function of the temperature (0.5-295 K) and external magnetic field (0.3-7.2 T). At very low T (0.5 K) the spectrum becomes very broad indicating freezing of the Fe 3+ moments in a superparamagnetic state. The temperature dependence of T 1 -1 and T 2 -1 shows strong field dependent enhancement below 50 K which must be related to the spin dynamics of the Fe 3+ moment freezing process, although no quantitative theory of this is currently available.
AB - The spin dynamics of a cluster of four iron(III) ions characterized by a total spin ground state S T=5 and Ising anisotropy have been investigated by the 1H nuclear magnetic resonance (NMR) linewidth and 1H NMR spin-lattice relaxation rate 1/T 1 as a function of the temperature (0.5-295 K) and external magnetic field (0.3-7.2 T). At very low T (0.5 K) the spectrum becomes very broad indicating freezing of the Fe 3+ moments in a superparamagnetic state. The temperature dependence of T 1 -1 and T 2 -1 shows strong field dependent enhancement below 50 K which must be related to the spin dynamics of the Fe 3+ moment freezing process, although no quantitative theory of this is currently available.
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U2 - 10.1063/1.1450790
DO - 10.1063/1.1450790
M3 - Article
AN - SCOPUS:0037094514
VL - 91
SP - 7173
EP - 7175
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 10 I
ER -