DOI: 10.1126/science.7701343. Classical and Quantum Magnetic Phenomena in Natural and Artificial Ferritin Proteins

Classical and Quantum Magnetic Phenomena in Natural and Artificial Ferritin Proteins

10.1126/science.7701343

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Artificial ferritin has been synthesized with control of both the magnetic state (antiferromagnetic or ferrimagnetic) and the particle size over an order of magnitude in the number of iron atoms. The magnetic properties of the artificial ferritin were compared with those of natural horse spleen ferritin in a range of temperatures (20 millikelvin to 300 kelvin) and fields (1 nanotesla to 27 tesla). In the classical regime, the blocking temperature was found to correlate with the average particle size. A correlation was also observed in the quantum regime between the resonance frequency of macroscopic quantum tunneling of the Neel vector and the particle size. At high magnetic fields (to 27 tesla), a spin flop transition with a strong dependence on orientation was seen in the natural ferritin, providing evidence of antiferromagnetism in this system.

Bibliography

Gider, S., Awschalom, D. D., Douglas, T., Mann, S., & Chaparala, M. (1995). Classical and Quantum Magnetic Phenomena in Natural and Artificial Ferritin Proteins. Science, 268(5207), 77â80.

Authors 5

S. Gider (first)
D. D. Awschalom (additional)
T. Douglas (additional)
S. Mann (additional)
M. Chaparala (additional)

References 32 Referenced 221

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AWSCHALOM, D.D., HAVE RESONANCE EXPERIMENTS SEEN MACROSCOPIC QUANTUM COHERENCE IN MAGNETIC PARTICLES - THE CASE FROM POWER ABSORPTION - COMMENT, PHYSICAL REVIEW LETTERS 71: 4276 (1993). (10.1103/PhysRevLett.71.4276) / PHYSICAL REVIEW LETTERS (1993)
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Chaparala, M., Superconductivity and Its Applications: 407 (1992). / Superconductivity and Its Applications (1992)
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FORD, G.C., FERRITIN - DESIGN AND FORMATION OF AN IRON-STORAGE MOLECULE, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES 304: 551 (1984). / PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES (1984)
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Dates

Type	When
Created	18 years, 10 months ago (Oct. 27, 2006, 2:19 p.m.)
Deposited	1 year, 7 months ago (Jan. 14, 2024, 11:23 p.m.)
Indexed	3 months, 1 week ago (May 26, 2025, 6:41 a.m.)
Issued	30 years, 4 months ago (April 7, 1995)
Published	30 years, 4 months ago (April 7, 1995)
Published Print	30 years, 4 months ago (April 7, 1995)

Funders 0

None

BibTeX

@article{Gider_1995, title={Classical and Quantum Magnetic Phenomena in Natural and Artificial Ferritin Proteins}, volume={268}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.7701343}, DOI={10.1126/science.7701343}, number={5207}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Gider, S. and Awschalom, D. D. and Douglas, T. and Mann, S. and Chaparala, M.}, year={1995}, month=apr, pages={77–80} }

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