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

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:
 [1];  [1];  [1];  [2];  [3];  [4];  [4];  [5];  [6]
  1. Univ. de Barcelona, Barcelona (Spain)
  2. Columbia Univ., New York, NY (United States)
  3. Columbia Univ., New York, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Esfera Univ. Autonoma Barcelona, Bellaterra (Spain)
  5. Esfera Univ. Autonoma Barcelona, Bellaterra (Spain); Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona (Spain)
  6. Lehman College, The City Univ. of New York, Bronx, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
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.
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. doi:10.1103/PhysRevB.91.024404.
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. doi:10.1103/PhysRevB.91.024404. https://www.osti.gov/servlets/purl/1182482.
@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 = {2015},
month = {1}
}

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