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Proton NMR study of the organic metal κ-(BETS) _2Mn[N(CN) _2] _3

机译:有机金属κ-(BETS)_2Mn [N(CN)_2] _3的质子NMR研究

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Magnetic properties of the organic conductor κ-(BETS) _2Mn[N(CN) _2] _3 above and below the temperature of the metal-insulator transition that occurs at T _(MI) ≈ 25 K are studied by ~1H NMR. The proton spectrum is shown to be determined by the static dipolar fields from Mn ~(2+) localized moments, while the ~1H spin-lattice relaxation is dominated by fluctuating fields from Mn ~(2+) electrons. The NMR data, both static (the spectra) and dynamic (the spin-lattice relaxation), indicate the freezing of Mn ~(2+) moments into a shortrange or an incommensurate long-range antiferromagnetic order below T _(MI).
机译:通过〜1H NMR研究了有机导体κ-(BETS)_2Mn [N(CN)_2] _3在T _(MI)≈25 K时发生的金属-绝缘体转变温度以上和以下的磁性。质子谱显示是由Mn〜(2+)局部矩的静态偶极场决定的,而〜1H自旋晶格弛豫主要由Mn〜(2+)电子的波动场决定。 NMR数据(静态(光谱)和动态(自旋晶格弛豫))均表明Mn〜(2+)矩在T _(MI)以下冻结为短程或不等长的反铁磁顺序。

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