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Nuclear spin-lattice relaxation in ferrimagnetic clusters and chains: A contrast between zero and one dimensions | | Hiromitsu Hori
; Shoji Yamamoto
; | | Date: |
27 Jun 2003 | | Subject: | Strongly Correlated Electrons; Statistical Mechanics | cond-mat.str-el cond-mat.stat-mech | | Abstract: | Motivated by ferrimagnetic oligonuclear and chain compounds synthesized by Caneschi et al., both of which consist of alternating manganese(II) ions and nitronyl-nitroxide radicals, we calculate the nuclear spin-lattice relaxation rate 1/T_1 employing a recently developed modified spin-wave theory. 1/T_1 as a function of temperature drastically varies with the location of probe nuclei in both clusters and chains, though the relaxation time scale is much larger in zero dimension than in one dimension. 1/T_1 as a function of an applied field in long chains forms a striking contrast to that in finite clusters, diverging with decreasing field like inverse square root at low temperatures and logarithmically at high temperatures. | | Source: | arXiv, cond-mat/0306685 | | Services: | Forum | Review | PDF | Favorites | |
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