Anisotropic nuclear inelastic scattering of an iron(II) molecular crystal

被引：61

作者：

Paulsen, H ^{[1
]}

Benda, R

Herta, C

Schünemann, V

Chumakov, AI

Duelund, L

Winkler, H

Toftlund, H

Trautwein, AX

机构：

[1] Med Univ Lubeck, Inst Phys, D-23538 Lubeck, Germany

[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[3] Odense Univ, Dept Chem, DK-5230 Odense, Denmark

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.86.1351

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nuclear inelastic scattering (NIS) spectra were recorded for a monocrystal of the spin-crossover complex [Fe(tptMetame)] (ClO4)(2) (tptMetame = 1, 1, 1-tris{[N-(2-pyridylmethyl)-N-methylamino]-methyl}ethane) at T = 30 K (low-spin state) and at room temperature thigh-spin state) for different crystal orientations. The high energy resolution (0.65 meV) allowed us to resolve individual molecular vibrations which were unambiguously identified by density functional calculations. From the NIS spectra for the first time the angular-resolved iron-partial density of phonon states (PDOS) was extracted. The PDOS corroborates a vibrational entropy difference as driving force of the spin transition.

引用

页码：1351 / 1354

页数：4