Magnetic and structural transitions in EuAg4As2 studied using 151Eu Mössbauer spectroscopy

Ryan, D. H.; Bud’ko, Sergey L.; Hu, Chaowei; Ni, N.

doi:10.1063/1.5129682

Magnetic and structural transitions in EuAg₄As₂ studied using ¹⁵¹Eu Mössbauer spectroscopy

Journal Article · Sat Nov 30 23:00:00 EST 2019 · AIP Advances

DOI:https://doi.org/10.1063/1.5129682· OSTI ID:1595768

^[1]; Bud’ko, Sergey L. ^[2]; Hu, Chaowei ^[3]; Ni, N. ^[3]

McGill Univ., Montreal, QC (Canada)
Ames Lab., Ames, IA (United States)
Univ. of California, Los Angeles, CA (United States)

¹⁵¹Eu Mössbauer spectroscopy confirms that the europium in EuAg₄As₂ is fully divalent and that the spectrum at 5 K consists of a single, sharp magnetic pattern with a hyperfine field (B_hf) of 27.1(1) T and an isomer shift of -11.04(3) mm/s (relative to EuF₃). The temperature dependence of the spectra shows that the ordering of the Eu moments proceeds via an incommensurate sine modulated structure starting at 15 K. The structure squares up below 9 K. A search for charge density or phonon softening signatures at the 120 K structural transition was not successful

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0011978; AC02-07CH11358

OSTI ID:: 1595768

Alternate ID(s):: OSTI ID: 1580632

Report Number(s):: IS-J-10140

Journal Information:: AIP Advances, Journal Name: AIP Advances Journal Issue: 12 Vol. 9; ISSN 2158-3226

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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