Ti 3 CrCu 4 : A possible 2-D ferromagnetic spin fluctuating system

Dhar, S. K.; Provino, A.; Manfrinetti, P.; Kulkarni, R.; Goyal, Neeraj; Paudyal, D.

doi:10.1063/1.4943922

Title: Ti ₃ CrCu ₄ : A possible 2-D ferromagnetic spin fluctuating system

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Abstract

Ti₃CrCu₄ is a new ternary compound which crystallizes in the tetragonal Ti₃Pd₅ structure type. The Cr atoms form square nets in the a-b plane (a = 3.124 Å) which are separated by an unusually large distance c = 11.228 Å along the tetragonal axis, thus forming a -2-D Cr-sublattice. The paramagnetic susceptibility is characterized by a low effective moment, μ_eff = 1.1 μ_B, a low paramagnetic Curie temperature θ_P (below 7 K) and a temperature independent χ0 = 6.7 x 10^–4 emu/mol. The magnetization at 1.8 K increases rapidly with field nearly saturating to 0.2 μ_B/f.u. The zero field heat capacity C/T shows an upturn below 7 K (~190 mJ/mol K² at ~0.1K) which is suppressed in applied magnetic fields and interpreted as suggesting the presence of spin fluctuations. The resistivity at low temperatures shows non-Fermi liquid behavior. Overall, the experimental data thus reveal an unusual magnetic state in Ti₃CrCu₄, which likely has its origin in the layered nature of the Cr sub-lattice and ferromagnetic spin fluctuations. Here, density functional theoretical calculations reveal a sharp Cr density of states peak just above the Fermi level, indicating the propensity of Ti₃CrCu₄ to become magnetic.

Authors:: Dhar, S. K.; Provino, A.; Manfrinetti, P.; Kulkarni, R.; Goyal, Neeraj; Paudyal, D.

Publication Date:: Sun May 01 00:00:00 EDT 2016

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

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

OSTI Identifier:: 1241418

Alternate Identifier(s):: OSTI ID: 1245624; OSTI ID: 1421034

Report Number(s):: IS-J-8877
Journal ID: ISSN 2158-3226

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Published Article

Journal Name:: AIP Advances

Additional Journal Information:: Journal Name: AIP Advances Journal Volume: 6 Journal Issue: 5; Journal ID: ISSN 2158-3226

Publisher:: American Institute of Physics

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

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                    Dhar, S. K., Provino, A., Manfrinetti, P., Kulkarni, R., Goyal, Neeraj, and Paudyal, D. Ti 3 CrCu 4 : A possible 2-D ferromagnetic spin fluctuating system.  United States: N. p., 2016. 
Web.  doi:10.1063/1.4943922.

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                    Dhar, S. K., Provino, A., Manfrinetti, P., Kulkarni, R., Goyal, Neeraj, & Paudyal, D. Ti 3 CrCu 4 : A possible 2-D ferromagnetic spin fluctuating system.  United States.  https://doi.org/10.1063/1.4943922

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                    Dhar, S. K., Provino, A., Manfrinetti, P., Kulkarni, R., Goyal, Neeraj, and Paudyal, D. Sun .  
"Ti 3 CrCu 4 : A possible 2-D ferromagnetic spin fluctuating system".  United States.  https://doi.org/10.1063/1.4943922.

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@article{osti_1241418,

  title        = {Ti 3 CrCu 4 : A possible 2-D ferromagnetic spin fluctuating system},

  author       = {Dhar, S. K. and Provino, A. and Manfrinetti, P. and Kulkarni, R. and Goyal, Neeraj and Paudyal, D.},

  abstractNote = {Ti3CrCu4 is a new ternary compound which crystallizes in the tetragonal Ti3Pd5 structure type. The Cr atoms form square nets in the a-b plane (a = 3.124 Å) which are separated by an unusually large distance c = 11.228 Å along the tetragonal axis, thus forming a -2-D Cr-sublattice. The paramagnetic susceptibility is characterized by a low effective moment, μeff = 1.1 μB, a low paramagnetic Curie temperature θP (below 7 K) and a temperature independent χ0 = 6.7 x 10–4 emu/mol. The magnetization at 1.8 K increases rapidly with field nearly saturating to 0.2 μB/f.u. The zero field heat capacity C/T shows an upturn below 7 K (~190 mJ/mol K2 at ~0.1K) which is suppressed in applied magnetic fields and interpreted as suggesting the presence of spin fluctuations. The resistivity at low temperatures shows non-Fermi liquid behavior. Overall, the experimental data thus reveal an unusual magnetic state in Ti3CrCu4, which likely has its origin in the layered nature of the Cr sub-lattice and ferromagnetic spin fluctuations. Here, density functional theoretical calculations reveal a sharp Cr density of states peak just above the Fermi level, indicating the propensity of Ti3CrCu4 to become magnetic.},

  doi          = {10.1063/1.4943922},

  journal      = {AIP Advances},

  number       = 5,

  volume       = 6,

  place        = {United States},

  year         = {Sun May 01 00:00:00 EDT 2016},

  month        = {Sun May 01 00:00:00 EDT 2016}

}

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Title: Ti 3 CrCu 4 : A possible 2-D ferromagnetic spin fluctuating system

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Title: Ti ₃ CrCu ₄ : A possible 2-D ferromagnetic spin fluctuating system