Journal of Superconductivity and Novel Magnetism ( IF 1.6 ) Pub Date : 2023-11-20 , DOI: 10.1007/s10948-023-06648-8 Kexuan Zhou , Kaiyang Gao , Zeyi Lu , Guochen Hu , Jiyu Shen , Zhongjin Wu , Min Liu
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In this paper, we irradiated K0.4Co1.3[Fe(CN)6]·nH2O with infrared light ([KCoFePBA]IIP) during the preparation process and compared them with normal preparations ([KCoFePBA]NP). XRD results show that the samples conform to the Fm-3 m space group, and the lattice constants are 10.230 Å ([KCoFePBA]NP) and 10.225 Å ([KCoFePBA]IIP), respectively. According to the results of Mössbauer spectroscopy, due to the induction of infrared light during the preparation process, part of the electrons are transferred from Co2+ to Fe3+, the paramagnetic Fe3+ (S = 1/2)-CN-Co2+ (S = 3/2) changes to the diamagnetic Fe2+ (S = 0)-CN-Co3+ (S = 0) by charge transfer. The magnetization measurement shows that the magnetization of [KCoFePBA]IIP is significantly less than that of [KCoFePBA]NP. At 300 K, the theoretical magnetic moments of [KCoFePBA]NP and [KCoFePBA]IIP are 4.60 µB and 4.37 µB, respectively. The difference in magnetism can be attributed to the charge transfer caused by infrared irradiation during the preparation process.
中文翻译:
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普鲁士蓝类似物 K0.4Co1.3[Fe(CN)6]·nH2O 的红外光诱导电荷转移
本文在制备过程中对K 0.4 Co 1.3 [Fe(CN) 6 ]·nH 2 O([KCoFePBA] IIP )进行红外光照射,并与普通制备物([KCoFePBA] NP )进行了比较。XRD结果表明,样品符合Fm-3 m空间群,晶格常数分别为10.230 Å ([KCoFePBA] NP )和10.225 Å ([KCoFePBA] IIP )。根据穆斯堡尔谱结果,在制备过程中由于红外光的感应,部分电子从Co 2+转移到Fe 3+,形成顺磁性的Fe 3+ ( S = 1/2)-CN- Co 2+ ( S = 3/2) 通过电荷转移 转变为抗磁性 Fe 2+ ( S = 0)-CN-Co 3+ ( S = 0)。磁化强度测量表明[KCoFePBA] IIP的磁化强度明显小于[KCoFePBA] NP的磁化强度。在 300 K 时,[KCoFePBA] NP和 [KCoFePBA] IIP的理论磁矩分别为 4.60 µ B和 4.37 µ B。磁性的差异可归因于制备过程中红外辐射引起的电荷转移。