Resonant spin tunneling in randomly oriented nanospheres of Mn12 acetate

Lendínez, S.; Zarzuela, R.; Tejada, J.; Terban, M. W.; Billinge, S. J. L.; Espin, J.; Imaz, I.; Maspoch, D.; Chudnovsky, E. M.

doi:10.1103/PhysRevB.91.024404

Title: Resonant spin tunneling in randomly oriented nanospheres of ${Mn}_{12}$ acetate

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Abstract

We report measurements and theoretical analysis of resonant spin tunneling in randomly oriented nanospheres of a molecular magnet. Amorphous nanospheres of Mn₁₂ acetate have been fabricated and characterized by chemical, infrared, TEM, X-ray, and magnetic methods. Magnetic measurements have revealed sharp tunneling peaks in the field derivative of the magnetization that occur at the typical resonant field values for the Mn₁₂ acetate crystal in the field parallel to the easy axis.Theoretical analysis is provided that explains these observations. We argue that resonant spin tunneling in a molecular magnet can be established in a powder sample, without the need for a single crystal and without aligning the easy magnetization axes of the molecules. This is confirmed by re-analyzing the old data on a powdered sample of non-oriented micron-size crystals of Mn₁₂ acetate. In conclusion, our findings can greatly simplify the selection of candidates for quantum spin tunneling among newly synthesized molecular magnets.

Authors:

Lendínez, S. ^[1]; Zarzuela, R. ^[1]; Tejada, J. ^[1]; Terban, M. W. ^[2]; Billinge, S. J. L. ^[3]; Espin, J. ^[4]; Imaz, I. ^[4]; Maspoch, D. ^[5]; Chudnovsky, E. M. ^[6]

Univ. de Barcelona, Barcelona (Spain)
Columbia Univ., New York, NY (United States)
Columbia Univ., New York, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Esfera Univ. Autonoma Barcelona, Bellaterra (Spain)
Esfera Univ. Autonoma Barcelona, Bellaterra (Spain); Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona (Spain)
Lehman College, The City Univ. of New York, Bronx, NY (United States)

Publication Date:: Tue Jan 06 00:00:00 EST 2015

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1182482

Alternate Identifier(s):: OSTI ID: 1180857

Report Number(s):: BNL-107313-2014-JA
Journal ID: ISSN 1098-0121; PRBMDO; R&D Project: PM032; KC0202010

Grant/Contract Number:: SC00112704; AC02-98CH10886

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. B, Condensed Matter and Materials Physics

Additional Journal Information:: Journal Volume: 91; Journal Issue: 2; Journal ID: ISSN 1098-0121

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Lendínez, S., Zarzuela, R., Tejada, J., Terban, M. W., Billinge, S. J. L., Espin, J., Imaz, I., Maspoch, D., and Chudnovsky, E. M. Resonant spin tunneling in randomly oriented nanospheres of Mn12 acetate.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevB.91.024404.

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                    Lendínez, S., Zarzuela, R., Tejada, J., Terban, M. W., Billinge, S. J. L., Espin, J., Imaz, I., Maspoch, D., & Chudnovsky, E. M. Resonant spin tunneling in randomly oriented nanospheres of Mn12 acetate.  United States.  https://doi.org/10.1103/PhysRevB.91.024404

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                    Lendínez, S., Zarzuela, R., Tejada, J., Terban, M. W., Billinge, S. J. L., Espin, J., Imaz, I., Maspoch, D., and Chudnovsky, E. M. Tue .  
"Resonant spin tunneling in randomly oriented nanospheres of Mn12 acetate".  United States.  https://doi.org/10.1103/PhysRevB.91.024404.  https://www.osti.gov/servlets/purl/1182482.

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@article{osti_1182482,

  title        = {Resonant spin tunneling in randomly oriented nanospheres of Mn12 acetate},

  author       = {Lendínez, S. and Zarzuela, R. and Tejada, J. and Terban, M. W. and Billinge, S. J. L. and Espin, J. and Imaz, I. and Maspoch, D. and Chudnovsky, E. M.},

  abstractNote = {We report measurements and theoretical analysis of resonant spin tunneling in randomly oriented nanospheres of a molecular magnet. Amorphous nanospheres of Mn₁₂ acetate have been fabricated and characterized by chemical, infrared, TEM, X-ray, and magnetic methods. Magnetic measurements have revealed sharp tunneling peaks in the field derivative of the magnetization that occur at the typical resonant field values for the Mn₁₂ acetate crystal in the field parallel to the easy axis.Theoretical analysis is provided that explains these observations. We argue that resonant spin tunneling in a molecular magnet can be established in a powder sample, without the need for a single crystal and without aligning the easy magnetization axes of the molecules. This is confirmed by re-analyzing the old data on a powdered sample of non-oriented micron-size crystals of Mn₁₂ acetate. In conclusion, our findings can greatly simplify the selection of candidates for quantum spin tunneling among newly synthesized molecular magnets.},

  doi          = {10.1103/PhysRevB.91.024404},

  journal      = {Physical Review. B, Condensed Matter and Materials Physics},

  number       = 2,

  volume       = 91,

  place        = {United States},

  year         = {Tue Jan 06 00:00:00 EST 2015},

  month        = {Tue Jan 06 00:00:00 EST 2015}

}

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Title: Resonant spin tunneling in randomly oriented nanospheres of Mn 12 acetate

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Title: Resonant spin tunneling in randomly oriented nanospheres of ${Mn}_{12}$ acetate