Partially disordered state with short-range spin correlation in S = 5 / 2 classical triangular antiferromagnet Ag 2 FeO 2

Yoshida, H. K.; Matsuda, M.; Stone, M. B.; dela Cruz, C. R.; Furubayashi, T.; Onoda, M.; Takayama-Muromachi, E.; Isobe, M.

doi:10.1103/PhysRevResearch.2.043211

Title: Partially disordered state with short-range spin correlation in $S = 5 / 2$ classical triangular antiferromagnet ${Ag}_{2} {FeO}_{2}$

Journal Article · Tue Nov 10 00:00:00 EST 2020 · Physical Review Research

DOI:https://doi.org/10.1103/PhysRevResearch.2.043211· OSTI ID:1708977

Yoshida, H. K.;

; Stone, M. B.; dela Cruz, C. R.; Furubayashi, T.; Onoda, M.; Takayama-Muromachi, E.; Isobe, M.

A triangular-lattice antiferromagnet of ${Ag}_{2} {FeO}_{2}$ was synthesized under high pressure. Its magnetism was studied in terms of electrical resistivity, magnetic susceptibility, heat capacity, powder neutron scattering, and Mössbauer spectroscopy. The magnetic state of ${Ag}_{2} {FeO}_{2}$ changes successively through a second-order phase transition at $T_{p} = 36$ K and a crossover at $T_{c} = 20$ K. A partially disordered (PD) state appears below $T_{p}$ , in which $\approx 2/3$ spins are ordered and the remaining $\approx 1/3$ spins fluctuate, which state persists at least down to 5 K. The spin correlation length starts to grow at $T_{p}$ ; however, it remains very short ( $\approx 27$ Å) below $T_{c}$ . This exotic magnetism is concerned with strong frustration in the classic antiferromagnetic triangular lattice.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Japan Society for the Promotion of Science (JSPS)

Grant/Contract Number:: AC05-00OR22725; 22-10454; 18K03529; 22560676; 22246083

OSTI ID:: 1708977

Alternate ID(s):: OSTI ID: 1712720

Journal Information:: Physical Review Research, Journal Name: Physical Review Research Vol. 2 Journal Issue: 4; ISSN 2643-1564

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Partially disordered state with short-range spin correlation in S = 5 / 2 classical triangular antiferromagnet Ag 2 FeO 2

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Title: Partially disordered state with short-range spin correlation in $S = 5 / 2$ classical triangular antiferromagnet ${Ag}_{2} {FeO}_{2}$