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Ferromagnetics, Based on Fullerenes

#3249


Obtaining of High-Temperature Ferromagnetics, Based on Fullerenes and Their Derivatives

Tech Area / Field

  • CHE-SYN/Basic and Synthetic Chemistry/Chemistry
  • PHY-SSP/Solid State Physics/Physics

Status
3 Approved without Funding

Registration date
08.04.2005

Leading Institute
VNIIEF, Russia, N. Novgorod reg., Sarov

Supporting institutes

  • Institute of Problems of Chemical Physics, Russia, Moscow reg., Chernogolovka

Collaborators

  • National Institute of Advanced Industrial Science and Technology (AIST) / Nanotechnology Research Institute, Japan, Tsukuba\nRice University / Electrical and Computer Engineering Department, USA, TX, Houston\nBechtel Nevada, USA, CA, Santa Barbara

Project summary

The invention of fullerenes in 1985 [1] that was awarded the Nobel Prize in chemistry in 1996 is one of the most important scientific achievements of the last century.

Nowadays special interest of the researches is aimed at magnetic properties of some fullerenes derivatives. Thus Tatiana L. Makarova revealed that polyfullerene samples have weak magnetization at Curie temperature of 500 K [2]. According to Curie temperature, magnetic phase, extracted from these samples, must have the properties of strong magnet. Besides, it was found out that fullerenes derivatives: hydrides, palladides and molecular complexes with organic donors [3-5] also could be ferromagnetics. To reveal essence of this phenomena systematic and thorough research of magnetic properties of different fullerenes derivatives is necessary.

Thus, the goal of this project is obtaining of materials with strong magnets properties based on fullerenes and their derivatives and investigation of these properties.

Nowadays, project participants from Institute of Problems of Chemical Physics RAS develop obtaining methods of different fullerenes derivatives with magnetic properties [3, 6]. Developed theoretical basics of synthesis and research of such compounds, experimental methods of magnetic properties analysis. RFNC-VNIIEF has many years experience of magnetic field creation in the range from 1 T to 1000 T, and in studying different substances and materials in magnetic fields using different methods (compensation, optical, RF and microwave) in a wide temperature range (up to helium temperatures). Different methods of magnetization and conductivity measurements in ultra-high magnetic fields [7-11] are developed and widely used. All these could be the foundation for successful implementation of the project.

Achievement of the setup goal assumes complex solution of the following tasks:

Synthesis and research of magnetic fullerites composition and structure, including synthesis of fullerenes hydrides and studying their composition and structure with element analysis method, UV-, visible- and IR-spectroscopy methods, ESR (electron spin resonance), RCA, RFA, atomic emission analysis, mass-spectrometry, 1H-,
13
C-spectroscopy.

Studying of samples properties obtained in magnetic fields of different intensity at different temperatures using compensation and FR methods, showing existence of magnetic moment of a sample.

Analysis and interpretation of the results, development of theoretical basics of experimental data description, search of ways of practical application of the obtained results.

Expected results and scientific value of the project lie in creation of types of materials, having unique magnetic properties; obtaining of laboratory samples of such materials for application in joint research with other research centers; revelation of the mechanism of ferromagnetism appearance in carbon based compounds.

Participation of collaborators within the frameworks of the project is supposed on the stage of joint investigations, discussion of the obtained results and estimation of their practical use possibilities. Project execution will make it possible to turn efforts of scientists and engineers, working in the field of nuclear weapon development and production, to solution of scientific issues aimed at obtaining and investigation of new materials.

References:

  1. Kroto, H.W., Heath, J.R., O'Brien, S.C., Curl, R.F., Smalley, R.E. C60: Buckminsterfullerene, Nature, 318, 162-163 (1985).
  2. Makarova T.L. Ferromagnetic Carbon. Nature, 413, 716, 718 (2001).
  3. Yu.M. Shulga, A.S. Lobach, I.N. Ivleva, Yu.G. Morozov, V.N. Spektor and A.A. Ovchinnikov. Magnetic properties of C60Pdn fullerides. Mol.Mat., 1998, Vol. 10, pp.201-206.
  4. S.V. Demishev, N.E. Sluchanko, L. Weckhuysen, V.V. Moshchalkov, H. Ohta, S. Okubo, Y. Oshima, N.G. Spitsina, Magnetizm of C60-based molecular complexes: high field magnetization and magneto-optical study. FTT, 44, 3 425 (2002).
  5. Allemand P.-M., Khemani K.C., Koch A., Wudl F., Holczer K., Donovan S., Grьner G., and Thompson J.D., Organic molecular soft ferromagnetism in a fullerene C60, Science, 253, 301- 303 (1991).
  6. A.S. Lobach, Yu.M. Shulga, O.S. Roshchupkina, A.I. Rebrov, A.A. Perov, Yu.G. Morozov, V.N. Spektor, A.A. Ovchinnikov. C60H18, C60H36 and C70H36 fullerene hydrides: study by methods of IR, NMR, XPS, EELS and magnetochemistry. Fullerene Science and Technology, 1998, vol.6, N3, 375-391.
  7. Knopfel G. Ultra-high pulsed magnetic fields // Translation from English. – M.: Mir. – 1972.
  8. Pavlovsky A.I., Dolotenko M.I., Bykov A.I., et al., Generation of reproducible pulsed magnetic fields up to 20 MG // DAS, 1994, v. 334, № 3, p.300.
  9. Lagutin A.S., Ozhogin V.I., High pulsed magnetic fields in physical experiments // M.: Energoatomizdat, 1988.
  10. High and ultra-high magnetic fields and their application // Translation from English / F.Herlach ed., -M.: Mir. – 1988.
  11. A.I.Pavlovsky, N.P.Kolokolchikov, M.I.Dolotenko, A.I.Bykov, O.M.Tatsenko. Reproducible generation of multi-megagauss magnetic fields. Megagauss Physics and Technology, P.J.Turchi ed., Plenum Press, NY and London, P.627-639, 1980.


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