Magnetic properties of CexY1-xPt compared to CexLa1-xPt ones

Ocko, M.; Zadro, K.; Drobac, D.; Aviani, I.; Salamon, K.; Mixon, D.; Bauer, E. D.; Sarrao, J. L.

doi:10.1016/j.jmmm.2017.12.014

Title: Magnetic properties of Ce_xY_1-xPt compared to Ce_xLa_1-xPt ones

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Abstract

In this paper, we have investigated the magnetic properties of the Ce_xY_1-xPt Kondo ferromagnetic alloy system in the temperature range from 1.8 K to 320 K. The results of these investigations can be summarized as follows: dc-susceptibility can be described by the Curie-Weiss law at higher temperatures down to about 100 K, but also at low temperatures above the ferromagnetic phase transition. At higher temperatures, the extracted Curie-Weiss parameter, θ_p, is negative and at low temperature θ_C is positive. The extracted effective magnetic moment above 100 K increases with the Ce content up to almost the theoretical value of the isolated Ce³⁺ ion, μ = 2.54 μ_B, for CePt. This suggests an increase of the hybridization with decreasing Ce content, or said equivalently, it means that the increase of the Kondo interaction diminishes effective magnetic moment. These observations confirm the main conclusions inferred from an earlier transport properties investigation of this alloy system. The corresponding θ_C differs within 1 K from the Curie temperature, T_C, which is determined by the resistivity measurements. The most intriguing result of the investigation of Ce_xY_1-xPt is the linear concentration dependence of T_C vs. x and, moreover, it is the same as in Ce_xLa_1-xPt althoughmore »« less

Authors:

Ocko, M. ^[1]; Zadro, K. ^[2]; Drobac, D. ^[3]; Aviani, I. ^[4]; Salamon, K. ^[5]; Mixon, D. ^[6]; Bauer, E. D. ^[6]; Sarrao, J. L. ^[6]

Inst. of Physics, Zagreb (Croatia); Ruđer Bošković Inst., Zagreb (Croatia). Center of Excellence for Advanced Materials and Sensing Devices
Univ. of Zagreb (Croatia). Dept. of Physics
Inst. of Physics, Zagreb (Croatia)
Inst. of Physics, Zagreb (Croatia); Univ. of Split (Croatia). Faculty of Science
Ruđer Bošković Inst., Zagreb (Croatia)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: 2017-12-05

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE; Ministry of Science and Education (Croatia)

OSTI Identifier:: 1441305

Report Number(s):: LA-UR-17-27085
Journal ID: ISSN 0304-8853

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Magnetism and Magnetic Materials

Additional Journal Information:: Journal Volume: 451; Journal ID: ISSN 0304-8853

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Material Science

Citation Formats


                    Ocko, M., Zadro, K., Drobac, D., Aviani, I., Salamon, K., Mixon, D., Bauer, E. D., and Sarrao, J. L. Magnetic properties of CexY1-xPt compared to CexLa1-xPt ones.  United States: N. p., 2017. 
Web.  doi:10.1016/j.jmmm.2017.12.014.

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                    Ocko, M., Zadro, K., Drobac, D., Aviani, I., Salamon, K., Mixon, D., Bauer, E. D., & Sarrao, J. L. Magnetic properties of CexY1-xPt compared to CexLa1-xPt ones.  United States.  https://doi.org/10.1016/j.jmmm.2017.12.014

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                    Ocko, M., Zadro, K., Drobac, D., Aviani, I., Salamon, K., Mixon, D., Bauer, E. D., and Sarrao, J. L. Tue .  
"Magnetic properties of CexY1-xPt compared to CexLa1-xPt ones".  United States.  https://doi.org/10.1016/j.jmmm.2017.12.014.  https://www.osti.gov/servlets/purl/1441305.

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@article{osti_1441305,

  title        = {Magnetic properties of CexY1-xPt compared to CexLa1-xPt ones},

  author       = {Ocko, M. and Zadro, K. and Drobac, D. and Aviani, I. and Salamon, K. and Mixon, D. and Bauer, E. D. and Sarrao, J. L.},

  abstractNote = {In this paper, we have investigated the magnetic properties of the CexY1-xPt Kondo ferromagnetic alloy system in the temperature range from 1.8 K to 320 K. The results of these investigations can be summarized as follows: dc-susceptibility can be described by the Curie-Weiss law at higher temperatures down to about 100 K, but also at low temperatures above the ferromagnetic phase transition. At higher temperatures, the extracted Curie-Weiss parameter, θp, is negative and at low temperature θC is positive. The extracted effective magnetic moment above 100 K increases with the Ce content up to almost the theoretical value of the isolated Ce3+ ion, μ = 2.54 μB, for CePt. This suggests an increase of the hybridization with decreasing Ce content, or said equivalently, it means that the increase of the Kondo interaction diminishes effective magnetic moment. These observations confirm the main conclusions inferred from an earlier transport properties investigation of this alloy system. The corresponding θC differs within 1 K from the Curie temperature, TC, which is determined by the resistivity measurements. The most intriguing result of the investigation of CexY1-xPt is the linear concentration dependence of TC vs. x and, moreover, it is the same as in CexLa1-xPt although in the former system the hybridization diminishes considerably the effective magnetic moment per Ce ion, while in the latter system, hybridization is minor and independent of x. Finally, we offer the explanations of these intriguing experimental results.},

  doi          = {10.1016/j.jmmm.2017.12.014},

  journal      = {Journal of Magnetism and Magnetic Materials},

  number       = ,

  volume       = 451,

  place        = {United States},

  year         = {2017},

  month        = {12}

}

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Title: Magnetic properties of CexY1-xPt compared to CexLa1-xPt ones

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Citation Formats

Title: Magnetic properties of Ce_xY_1-xPt compared to Ce_xLa_1-xPt ones