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ヤマガミ ヒロシ
YAMAGAMI HIROSHI
山上 浩志 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 発行・発表の年月 | 2012/01/01 |
| 形態種別 | その他 |
| 査読 | 査読あり |
| 標題 | Electronic configuration of Mn ions in the π-d molecular ferromagnet β-Mn phthalocyanine studied by soft X-ray magnetic circular dichroism |
| 執筆形態 | その他 |
| 掲載誌名 | Solid State Communications |
| 巻・号・頁 | 152,806-809頁 |
| 著者・共著者 | T. Kataoka,Y. Sakamoto,Y. Yamazaki,V. R. Singh,A. Fujimori,Y. Takeda,T. Ohkochi,S. I. Fujimori,T. Okane,Y. Saitoh,H. Yamagami,A. Tanaka |
| 概要 | We have studied the electronic structure of the molecular ferromagnet β-Mn phthalocyanine (β-MnPc) in a polycrystalline form, which has been reported to show ferromagnetism at T < 8. 6 K, by X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD). From the experimental results and subsequent cluster-model calculation, we find that the ferromagnetic Mn ion in β-MnPc is largely in the 4Eg ground state arising from the (eg)3(b2g) 1(a1g)1 [(dxz,yz)3(d xy)1(dz2)1] configuration of the Mn2+ state. Considering that the highest occupied molecular orbital (HOMO) of MnPc with the 4Eg ground state originates from the a1g orbital of the Mn2+ ion, it is proposed that a1g-a1g exchange coupling via the π orbitals of the phthalocyanine ring plays a crucial role in the ferromagnetism of β-MnPc. © 2012 Elsevier Ltd. All rights reserved. |
| DOI | 10.1016/j.ssc.2012.01.036 |
| ISSN | 0038-1098 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84859796427&origin=inward |