| Autor: |
Ashley S Dale, Saeed Yazdani, Thilini K Ekanayaka, Esha Mishra, Yuchen Hu, Peter A Dowben, John W Freeland, Jian Zhang, Ruihua Cheng |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
JPhys Materials, Vol 6, Iss 3, p 035010 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2515-7639 |
| DOI: |
10.1088/2515-7639/ace21a |
| Popis: |
In this work, we provide clear evidence of magnetic anisotropy in the local orbital moment of a molecular thin film based on the SCO complex [Fe(H _2 B(pz) _2 ) _2 (bipy)] (pz = pyrazol−1−yl, bipy = 2,2′−bipyridine). Field dependent x-ray magnetic circular dichroism measurements indicate that the magnetic easy axis for the orbital moment is along the surface normal direction. Along with the presence of a critical field, our observation points to the existence of an anisotropic energy barrier in the high-spin state. The estimated nonzero coupling constant of ∼2.47 × 10 ^−5 eV molecule ^−1 indicates that the observed magnetocrystalline anisotropy is mostly due to spin–orbit coupling. The spin- and orbital-component anisotropies are determined to be 30.9 and 5.04 meV molecule ^−1 , respectively. Furthermore, the estimated g factor in the range of 2.2–2.45 is consistent with the expected values. This work has paved the way for an understanding of the spin-state-switching mechanism in the presence of magnetic perturbations. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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