Enhancement of magnetocaloric effect in the Gd2Al phase by Co alloying

Huang, Z. Y.; Fu, H.; Hadimani, R. L.; Balfour, E. Agurgo; Dembele, S. N.; Teng, B. H.; Jiles, D. C.

doi:10.1063/1.4900782

Title: Enhancement of magnetocaloric effect in the Gd₂Al phase by Co alloying

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Abstract

We observe that Cu clusters grow on surface terraces of graphite as a result of physical vapor deposition in ultrahigh vacuum. We show that the observation is incompatible with a variety of models incorporating homogeneous nucleation and high level calculations of atomic-scale energetics. An alternative explanation, ion-mediated heterogeneous nucleation, is proposed and validated, both with theory and experiment. This serves as a case study in identifying when and whether the simple, common observation of metal clusters on carbon-rich surfaces can be interpreted in terms of homogeneous nucleation. We describe a general approach for making system-specific and laboratory-specific predictions.

Authors:

Huang, Z. Y. ^[1]; Fu, H. ^[1]; Hadimani, R. L. ^[2]; Balfour, E. Agurgo ^[1]; Dembele, S. N. ^[1]; Teng, B. H. ^[1]; Jiles, D. C. ^[2]

Univ. of Electronic Science and Technology of China, Chengdu (China)
Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)

Publication Date:: Fri Nov 14 00:00:00 EST 2014

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1225530

Report Number(s):: IS-J-8541
Journal ID: ISSN 0021-8979; JAPIAU

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 116; Journal Issue: 18; Journal ID: ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Gd₂Al intermetallic compound; magnetocaloric effect; field-induced transition; aluminum; ferromagnetism; entropy; alloy phase transitions; Curie point

Citation Formats


                    Huang, Z. Y., Fu, H., Hadimani, R. L., Balfour, E. Agurgo, Dembele, S. N., Teng, B. H., and Jiles, D. C. Enhancement of magnetocaloric effect in the Gd2Al phase by Co alloying.  United States: N. p., 2014. 
Web.  doi:10.1063/1.4900782.

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                    Huang, Z. Y., Fu, H., Hadimani, R. L., Balfour, E. Agurgo, Dembele, S. N., Teng, B. H., & Jiles, D. C. Enhancement of magnetocaloric effect in the Gd2Al phase by Co alloying.  United States.  https://doi.org/10.1063/1.4900782

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                    Huang, Z. Y., Fu, H., Hadimani, R. L., Balfour, E. Agurgo, Dembele, S. N., Teng, B. H., and Jiles, D. C. Fri .  
"Enhancement of magnetocaloric effect in the Gd2Al phase by Co alloying".  United States.  https://doi.org/10.1063/1.4900782.  https://www.osti.gov/servlets/purl/1225530.

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@article{osti_1225530,

  title        = {Enhancement of magnetocaloric effect in the Gd2Al phase by Co alloying},

  author       = {Huang, Z. Y. and Fu, H. and Hadimani, R. L. and Balfour, E. Agurgo and Dembele, S. N. and Teng, B. H. and Jiles, D. C.},

  abstractNote = {We observe that Cu clusters grow on surface terraces of graphite as a result of physical vapor deposition in ultrahigh vacuum. We show that the observation is incompatible with a variety of models incorporating homogeneous nucleation and high level calculations of atomic-scale energetics. An alternative explanation, ion-mediated heterogeneous nucleation, is proposed and validated, both with theory and experiment. This serves as a case study in identifying when and whether the simple, common observation of metal clusters on carbon-rich surfaces can be interpreted in terms of homogeneous nucleation. We describe a general approach for making system-specific and laboratory-specific predictions.},

  doi          = {10.1063/1.4900782},

  journal      = {Journal of Applied Physics},

  number       = 18,

  volume       = 116,

  place        = {United States},

  year         = {Fri Nov 14 00:00:00 EST 2014},

  month        = {Fri Nov 14 00:00:00 EST 2014}

}

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Title: Enhancement of magnetocaloric effect in the Gd2Al phase by Co alloying

Abstract

Citation Formats

Title: Enhancement of magnetocaloric effect in the Gd₂Al phase by Co alloying