Character of magnetic instabilities in CaFe2As2

Title: Character of magnetic instabilities in CaFe2As2

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Abstract

The density-functional spin susceptibility has been analyzed in different phases of CaFe{sub 2}As{sub 2} and compared with similar data for pure d metals. The conditions for the 'no local-moment' itinerant state with large frustrations are found for the 'collapsed' phase. This itineracy determines the instability versus the incommensurate magnetic order for the narrow region of wave vectors. For the ambient pressure phase, the local moments on Fe atoms with much less frustrated antiferromagnetic interactions are stabilized and a magnetic short-range or long-range order is developed. The system is close to the point of magnetic instability and spin fluctuations should be included to describe properties of this system.

Authors:: Samolyuk, G; Antropov, V

Publication Date:: 2009-02-19

Research Org.:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 977175

Report Number(s):: IS-J 7480
Journal ID: 1098-0121; TRN: US201009%%312

DOE Contract Number:: DE-AC02-07CH11358

Resource Type:: Journal Article

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 79; Journal Issue: 052505

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMS; FLUCTUATIONS; INSTABILITY; SPIN; VECTORS

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                    Samolyuk, G, and Antropov, V. Character of magnetic instabilities in CaFe2As2.  United States: N. p., 2009. 
        Web.

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                    Samolyuk, G, & Antropov, V. Character of magnetic instabilities in CaFe2As2.  United States.

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                    Samolyuk, G, and Antropov, V. Thu .  
        "Character of magnetic instabilities in CaFe2As2".  United States.

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@article{osti_977175,

  title        = {Character of magnetic instabilities in CaFe2As2},

  author       = {Samolyuk, G and Antropov, V},

  abstractNote = {The density-functional spin susceptibility has been analyzed in different phases of CaFe{sub 2}As{sub 2} and compared with similar data for pure d metals. The conditions for the 'no local-moment' itinerant state with large frustrations are found for the 'collapsed' phase. This itineracy determines the instability versus the incommensurate magnetic order for the narrow region of wave vectors. For the ambient pressure phase, the local moments on Fe atoms with much less frustrated antiferromagnetic interactions are stabilized and a magnetic short-range or long-range order is developed. The system is close to the point of magnetic instability and spin fluctuations should be included to describe properties of this system.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/977175},
  journal      = {Physical Review B},
number       = 052505,

  volume       = 79,

  place        = {United States},

  year         = {2009},

  month        = {2}

}

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