Exceptionally high blocking temperature of 17 K in a surface-supported molecular magnet

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2021
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Liu, Fupin
Romankov, Vladyslav
Dreiser, Jan
Popov, Alexey A.
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Advanced Materials. Wiley. 2021, 33(40), 2102844. ISSN 0935-9648. eISSN 1521-4095. Available under: doi: 10.1002/adma.202102844
Zusammenfassung

Single-molecule magnets (SMMs) are among the most promising building blocks for future magnetic data storage or quantum computing applications, owing to magnetic bistability and long magnetic relaxation times. The practical device integration requires realization of 2D surface assemblies of SMMs, where each magnetic unit shows magnetic relaxation being sufficiently slow at application-relevant temperatures. Using X-ray absorption spectroscopy and X-ray magnetic circular dichroism, it is shown that sub-monolayers of Dy2 @C80 (CH2 Ph) dimetallofullerenes prepared on graphene by electrospray deposition exhibit magnetic behavior fully comparable to that of the bulk. Magnetic hysteresis and relaxation time measurements show that the magnetic moment remains stable for 100 s at 17 K, marking the blocking temperature TB(100) , being not only in excellent agreement with that of the bulk sample but also representing by far the highest one detected for a surface-supported single-molecule magnet. The reported findings give a boost to the efforts to stabilize and address the spin degree of freedom in molecular magnets aiming at the realization of SMM-based spintronic units.

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ISO 690PASCHKE, Fabian, Tobias BIRK, Vivien Anna-Lena ENENKEL, Fupin LIU, Vladyslav ROMANKOV, Jan DREISER, Alexey A. POPOV, Mikhail FONIN, 2021. Exceptionally high blocking temperature of 17 K in a surface-supported molecular magnet. In: Advanced Materials. Wiley. 2021, 33(40), 2102844. ISSN 0935-9648. eISSN 1521-4095. Available under: doi: 10.1002/adma.202102844
BibTex
@article{Paschke2021-10Excep-54044,
  year={2021},
  doi={10.1002/adma.202102844},
  title={Exceptionally high blocking temperature of 17 K in a surface-supported molecular magnet},
  number={40},
  volume={33},
  issn={0935-9648},
  journal={Advanced Materials},
  author={Paschke, Fabian and Birk, Tobias and Enenkel, Vivien Anna-Lena and Liu, Fupin and Romankov, Vladyslav and Dreiser, Jan and Popov, Alexey A. and Fonin, Mikhail},
  note={Article Number: 2102844}
}
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