论文标题
通过晶体内氨基酸调整锰（II）碳酸盐的磁化
Tuning the Magnetization of Manganese (II) Carbonate by Intracrystalline Amino Acids
论文作者
论文摘要
将有机分子掺入无机晶体宿主的晶格中是生物矿化中的常见现象，并且已证明可以改变晶体宿主的各种特性。以这种现象为我们的灵感来源，我们在这里表明将特定的单个氨基酸掺入锰（II）碳酸盐（II）的晶格中，强烈改变了其固有的磁性特性。在室温下，遵循简单的混合物规则，氨基酸含有氨基酸的磁性敏感性降低。然而，当冷却在Néel温度以下时，观察到相反的趋势，即在高磁场中测得的磁化率增加。这种增加，伴随着N'eel相变温温度的急剧变化，这是由于MNCO3轨道重叠的降低以及甲壳相互作用的减弱所致。
Incorporation of organic molecules into the lattice of inorganic crystalline hosts is a common phenomenon in biomineralization, and has been shown to alter various properties of the crystalline host. Taking this phenomenon as our source of inspiration, we show herein that incorporation of specific single amino acids into the lattice of manganese (II) carbonate strongly alters its inherent magnetic properties. At room temperature, the magnetic susceptibility of the amino-acid-incorporating paramagnetic MnCO3 decreases, following a simple rule of mixtures. When cooled below the Néel temperature, however, the opposite trend is observed, namely an increase in magnetic susceptibility measured in a high magnetic field. Such an increase, accompanied by a drastic change in the N'eel phase transformation temperature, results from a decrease in MnCO3 orbital overlapping and the weakening of superexchange interactions.
