Robaschik Peter, Ma Ye, Din Salahud, Heutz Sandrine
Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Rd, London SW7 2AZ, United Kingdom.
Kurt J. Lesker Company, Sidney Little Rd, St Leonard's on Sea TN38 9PU, United Kingdom.
Beilstein J Nanotechnol. 2017 Jul 14;8:1469-1475. doi: 10.3762/bjnano.8.146. eCollection 2017.
We report on a new approach for the fabrication of ferromagnetic molecular thin films. Co-evaporated films of manganese phthalocyanine (MnPc) and tetracyanoquinodimethane (TCNQ) have been produced by organic molecular beam deposition (OMBD) on rigid (glass, silicon) and flexible (Kapton) substrates kept at room temperature. The MnPc:TCNQ films are found to be entirely amorphous due to the size mismatch of the molecules. However, by annealing while covering the samples highly crystalline MnPc films in the β-polymorph can be obtained at 60 °C lower than when starting with pure MnPc films. The resulting films exhibit substantial coercivity (13 mT) at 2 K and a Curie temperature of 11.5 K.
我们报道了一种制备铁磁分子薄膜的新方法。通过有机分子束沉积（OMBD）在室温下的刚性（玻璃、硅）和柔性（Kapton）衬底上制备了锰酞菁（MnPc）和四氰基对苯二醌二甲烷（TCNQ）的共蒸发薄膜。由于分子尺寸不匹配，发现MnPc:TCNQ薄膜完全是非晶态的。然而，通过在覆盖样品的同时进行退火，在比以纯MnPc薄膜开始时低60°C的温度下可以获得β-多晶型的高度结晶的MnPc薄膜。所得薄膜在2 K时表现出显著的矫顽力（13 mT）和11.5 K的居里温度。
