Study of ⁵⁷Fe Mössbauer effect in RFe₂Zn₂₀ ( R = Lu, Yb, Gd)

Journal Article · Tue Aug 04 00:00:00 EDT 2015 · Journal of Physics. Condensed Matter

DOI:https://doi.org/10.1088/0953-8984/27/33/336003· OSTI ID:1221920

Bud’ko, Sergey L. ^[1]; Kong, Tai ^[1]; Ma, Xiaoming ^[2]; Canfield, Paul C. ^[1]

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1. Ames Lab., Ames, IA (United States)
2. Ames Lab., Ames, IA (United States); Lanzhou Univ. Gansu Province (China). Institute of Applied Magnetics

In this document we report measurements of ⁵⁷Fe Mössbauer spectra for RFe₂Zn₂₀ (R = Lu, Yb, Gd) from ~ 4.5 K to room temperature. The obtained isomer shift values are very similar for all three compounds, their temperature dependence was analyzed within the Debye model and resulted in an estimate of the Debye temperatures of 450-500 K. The values of quadrupole splitting at room temperature change with the cubic lattice constant a in a linear fashion. For GdFe₂Zn₂₀, ferromagnetic order is seen as an appearance of a sextet in the spectra. The ⁵⁷Fe site hyperfine field for T → 0 was evaluated to be ~ 2.4 T.

• Research Organization: Ames Laboratory (AMES), Ames, IA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-07CH11358
• OSTI ID: 1221920
• Alternate ID(s): OSTI ID: 22880734
• Report Number(s): IS-J--8763
• Journal Information: Journal of Physics. Condensed Matter, Journal Name: Journal of Physics. Condensed Matter Journal Issue: 33 Vol. 27; ISSN 0953-8984
• Publisher: IOP Publishing
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
RFe2Zn20
Mössbauer effect