Heat capacity, resistivity, and angular dependent magnetization studies of single crystal Nd1+ϵFe4B4 for ϵ≈17

Conner, Benjamin S.; Susner, Michael A.; Lampen-Kelley, Paula; May, Andrew F.; McGuire, Michael A.; Yan, Jiaqiang; Sales, Brian C.

doi:10.1016/j.jmmm.2017.04.002

Title: Heat capacity, resistivity, and angular dependent magnetization studies of single crystal ${Nd}_{1 + ϵ} {Fe}_{4} B_{4}$ for $ϵ \approx \frac{1}{7}$

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Abstract

Advances in crystal growth have allowed for synthesis of large single crystals of Nd_1+ϵFe₄B₄, a well-known phase with a modulated structure. As a result we are able to report heat capacity and resistivity measurements on a single crystal Nd_1+ϵFe₄B₄ sample with a distribution of ϵ that skews towards the solubility limit of Nd near ϵ ≈ 17. Heat capacity measurements show evidence of crystal field splitting at temperatures higher than the long-range ferromagnetic Curie temperature. Heat capacity, resistivity, and magnetization measurements all confirm a Curie temperature of 7 K which is lower than previously reported values in the Nd_1+ϵFe₄B₄ system. Here, we also perform measurements of the angular dependence of the magnetization and discover behavior associated with the magnetic anisotropy that is inconsistent with the simple description previously proposed.

Authors:

Conner, Benjamin S. ^[1]; Susner, Michael A. ^[1]; UES Inc., Beavercreek, OH ^[2]; Lampen-Kelley, Paula ^[1]; May, Andrew F. ^[1]; McGuire, Michael A. ^[1]; Yan, Jiaqiang ^[1]; Sales, Brian C. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
(United States)

Publication Date:: Tue Apr 04 00:00:00 EDT 2017

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Critical Materials Institute (CMI)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

OSTI Identifier:: 1350932

Alternate Identifier(s):: OSTI ID: 1396908

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Magnetism and Magnetic Materials

Additional Journal Information:: Journal Volume: 435; Journal Issue: C; Journal ID: ISSN 0304-8853

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Nd1+ϵFe4B4; magnetic anisotropy; crystal fields; resistivity; heat capacity

Citation Formats


                    Conner, Benjamin S., Susner, Michael A., UES Inc., Beavercreek, OH, Lampen-Kelley, Paula, May, Andrew F., McGuire, Michael A., Yan, Jiaqiang, and Sales, Brian C. Heat capacity, resistivity, and angular dependent magnetization studies of single crystal Nd1+ϵFe4B4 for ϵ≈17.  United States: N. p., 2017. 
Web.  doi:10.1016/j.jmmm.2017.04.002.

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                    Conner, Benjamin S., Susner, Michael A., UES Inc., Beavercreek, OH, Lampen-Kelley, Paula, May, Andrew F., McGuire, Michael A., Yan, Jiaqiang, & Sales, Brian C. Heat capacity, resistivity, and angular dependent magnetization studies of single crystal Nd1+ϵFe4B4 for ϵ≈17.  United States.  https://doi.org/10.1016/j.jmmm.2017.04.002

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                    Conner, Benjamin S., Susner, Michael A., UES Inc., Beavercreek, OH, Lampen-Kelley, Paula, May, Andrew F., McGuire, Michael A., Yan, Jiaqiang, and Sales, Brian C. Tue .  
"Heat capacity, resistivity, and angular dependent magnetization studies of single crystal Nd1+ϵFe4B4 for ϵ≈17".  United States.  https://doi.org/10.1016/j.jmmm.2017.04.002.  https://www.osti.gov/servlets/purl/1350932.

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@article{osti_1350932,

  title        = {Heat capacity, resistivity, and angular dependent magnetization studies of single crystal Nd1+ϵFe4B4 for ϵ≈17},

  author       = {Conner, Benjamin S. and Susner, Michael A. and UES Inc., Beavercreek, OH and Lampen-Kelley, Paula and May, Andrew F. and McGuire, Michael A. and Yan, Jiaqiang and Sales, Brian C.},

  abstractNote = {Advances in crystal growth have allowed for synthesis of large single crystals of Nd1+ϵFe4B4, a well-known phase with a modulated structure. As a result we are able to report heat capacity and resistivity measurements on a single crystal Nd1+ϵFe4B4 sample with a distribution of ϵ that skews towards the solubility limit of Nd near ϵ ≈ 17. Heat capacity measurements show evidence of crystal field splitting at temperatures higher than the long-range ferromagnetic Curie temperature. Heat capacity, resistivity, and magnetization measurements all confirm a Curie temperature of 7 K which is lower than previously reported values in the Nd1+ϵFe4B4 system. Here, we also perform measurements of the angular dependence of the magnetization and discover behavior associated with the magnetic anisotropy that is inconsistent with the simple description previously proposed.},

  doi          = {10.1016/j.jmmm.2017.04.002},

  journal      = {Journal of Magnetism and Magnetic Materials},

  number       = C,

  volume       = 435,

  place        = {United States},

  year         = {Tue Apr 04 00:00:00 EDT 2017},

  month        = {Tue Apr 04 00:00:00 EDT 2017}

}

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Title: Heat capacity, resistivity, and angular dependent magnetization studies of single crystal ${Nd}_{1 + ϵ} {Fe}_{4} B_{4}$ for $ϵ \approx \frac{1}{7}$