Eu3Ir2In15: A mixed-valent and vacancy-filled variant of the Sc5Co4Si10 structure type with anomalous magnetic properties

Sarkar, Sumanta; Jana, Rajkumar; Siva, Ramesh; Banerjee, Swastika; Pati, Swapan K.; Balasubramanian, Mahalingam; Peter, Sebastian C.

doi:10.1021/acs.inorgchem.5b01926

Title: Eu₃Ir₂In₁₅: A mixed-valent and vacancy-filled variant of the Sc₅Co₄Si₁₀ structure type with anomalous magnetic properties

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Abstract

Here, a new compound, Eu₃Ir₂In₁₅ has been synthesized using indium as an active metal flux. The compound crystallizes in tetragonal P4/mbm space group with lattice parameters, a = 14.8580(4) Å, b = 14.8580(4) Å, c = 4.3901(2) Å. It was further characterized by SEM-EDX studies. The temperature dependent magnetic susceptibility suggests that Eu in this compound is exclusively in divalent state. The effective magnetic moment (μ_eff) of this compound is 7.35 μ_B/Eu ion with paramagnetic Curie temperature (θ_p) of -28 K suggesting antiferromagnetic interaction. The mixed valent nature of Eu observed in magnetic measurements was confirmed by XANES measurements. The compound undergoes demagnetization at a low magnetic field (10 Oe), which is quite unusual for Eu based intermetallic compounds. Temperature dependent resistivity studies reveal that the compound is metallic in nature. A comparative study was made between Eu₃Ir₂In₁₅ and hypothetical vacancy variant Eu₅Ir₄In₁₀ which also crystallizes in the same crystal structure However our computational studies along with control experiments suggest that the latter is thermodynamically less feasible compared to the former and hence we proposed that it is highly unlikely that a RE₅T₄X₁₀ would exist with X as a group 13 elements.

Authors:

Sarkar, Sumanta ^[1]; Jana, Rajkumar ^[1]; Siva, Ramesh ^[1]; Banerjee, Swastika ^[1]; Pati, Swapan K. ^[1]; Balasubramanian, Mahalingam ^[2]; Peter, Sebastian C. ^[1]

Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore (India)
Argonne National Lab. (ANL), Argonne, IL (United States)

Publication Date:: Tue Oct 27 00:00:00 EDT 2015

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

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

OSTI Identifier:: 1248022

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Journal Article: Accepted Manuscript

Journal Name:: Inorganic Chemistry

Additional Journal Information:: Journal Volume: 54; Journal Issue: 22; Journal ID: ISSN 0020-1669

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; magnetism; metal flux technique; resistivity; crystallography; intermetallics

Citation Formats


                    Sarkar, Sumanta, Jana, Rajkumar, Siva, Ramesh, Banerjee, Swastika, Pati, Swapan K., Balasubramanian, Mahalingam, and Peter, Sebastian C. Eu3Ir2In15: A mixed-valent and vacancy-filled variant of the Sc5Co4Si10 structure type with anomalous magnetic properties.  United States: N. p., 2015. 
        Web.  doi:10.1021/acs.inorgchem.5b01926.

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                    Sarkar, Sumanta, Jana, Rajkumar, Siva, Ramesh, Banerjee, Swastika, Pati, Swapan K., Balasubramanian, Mahalingam, & Peter, Sebastian C. Eu3Ir2In15: A mixed-valent and vacancy-filled variant of the Sc5Co4Si10 structure type with anomalous magnetic properties.  United States.  https://doi.org/10.1021/acs.inorgchem.5b01926

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                    Sarkar, Sumanta, Jana, Rajkumar, Siva, Ramesh, Banerjee, Swastika, Pati, Swapan K., Balasubramanian, Mahalingam, and Peter, Sebastian C. 2015.  
        "Eu3Ir2In15: A mixed-valent and vacancy-filled variant of the Sc5Co4Si10 structure type with anomalous magnetic properties".  United States.  https://doi.org/10.1021/acs.inorgchem.5b01926.  https://www.osti.gov/servlets/purl/1248022.

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@article{osti_1248022,

  title        = {Eu3Ir2In15: A mixed-valent and vacancy-filled variant of the Sc5Co4Si10 structure type with anomalous magnetic properties},

  author       = {Sarkar, Sumanta and Jana, Rajkumar and Siva, Ramesh and Banerjee, Swastika and Pati, Swapan K. and Balasubramanian, Mahalingam and Peter, Sebastian C.},

  abstractNote = {Here, a new compound, Eu3Ir2In15 has been synthesized using indium as an active metal flux. The compound crystallizes in tetragonal P4/mbm space group with lattice parameters, a = 14.8580(4) Å, b = 14.8580(4) Å, c = 4.3901(2) Å. It was further characterized by SEM-EDX studies. The temperature dependent magnetic susceptibility suggests that Eu in this compound is exclusively in divalent state. The effective magnetic moment (μeff) of this compound is 7.35 μB/Eu ion with paramagnetic Curie temperature (θp) of -28 K suggesting antiferromagnetic interaction. The mixed valent nature of Eu observed in magnetic measurements was confirmed by XANES measurements. The compound undergoes demagnetization at a low magnetic field (10 Oe), which is quite unusual for Eu based intermetallic compounds. Temperature dependent resistivity studies reveal that the compound is metallic in nature. A comparative study was made between Eu3Ir2In15 and hypothetical vacancy variant Eu5Ir4In10 which also crystallizes in the same crystal structure However our computational studies along with control experiments suggest that the latter is thermodynamically less feasible compared to the former and hence we proposed that it is highly unlikely that a RE5T4X10 would exist with X as a group 13 elements.},

  doi          = {10.1021/acs.inorgchem.5b01926},

  url          = {https://www.osti.gov/biblio/1248022},
  journal      = {Inorganic Chemistry},

  issn         = {0020-1669},

  number       = 22,

  volume       = 54,

  place        = {United States},

  year         = {Tue Oct 27 00:00:00 EDT 2015},

  month        = {Tue Oct 27 00:00:00 EDT 2015}

}

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Title: Eu3Ir2In15: A mixed-valent and vacancy-filled variant of the Sc5Co4Si10 structure type with anomalous magnetic properties

Abstract

Citation Formats

Title: Eu₃Ir₂In₁₅: A mixed-valent and vacancy-filled variant of the Sc₅Co₄Si₁₀ structure type with anomalous magnetic properties