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Competing spin-glass and spin-fluctuation states in Nd$_x$Pr$_{4-x}$Ni$_3$O$_8$


Huangfu, Shangxiong; Guguchia, Zurab; Shang, T; Lin, Hai; Liu, Huanlong; Zhang, Xiaofu; Luetkens, H; Schilling, Andreas (2023). Competing spin-glass and spin-fluctuation states in Nd$_x$Pr$_{4-x}$Ni$_3$O$_8$. Physical review B, 108:014410.

Abstract

Neodymium nickelates have attracted research interest due to their strongly correlated behavior and remarkable magnetic properties. More importantly, superconductivity has recently been confirmed in thin-film samples of Sr-doped NdNiO$_2$, bringing the layered rare earth nickel oxides into the research spotlight. In this report, we present results on a series of NdNiO$_2$ analogs, Nd$_x$Pr$_{4−x}$Ni$_3$O$_8$ (x=0.1, 0.25, 1, 2, and 4) obtained by topotactic reduction, in which we observe systematic changes in the magnetic behavior. As the Nd$^{3+}$ content increases, the initially large spin-freezing region with magnetic frustration becomes smaller and gradually shifts to low temperatures, while the magnetic response gradually increases. The muon-spin spectroscopy measurements on Nd$_4$Ni$_3$O$_8$ show that this phenomenon is likely due to the enhancement of spin fluctuations in Nd$_x$Pr$_{4-x}$Ni$_3$O$_8$, which weakens the spin frustration behavior for high Nd$^{3+}$ contents and at low temperatures. These spin fluctuations can be caused by both Nd and Ni ions and could be one of the factors determining the occurrence of possible superconductivity.

Abstract

Neodymium nickelates have attracted research interest due to their strongly correlated behavior and remarkable magnetic properties. More importantly, superconductivity has recently been confirmed in thin-film samples of Sr-doped NdNiO$_2$, bringing the layered rare earth nickel oxides into the research spotlight. In this report, we present results on a series of NdNiO$_2$ analogs, Nd$_x$Pr$_{4−x}$Ni$_3$O$_8$ (x=0.1, 0.25, 1, 2, and 4) obtained by topotactic reduction, in which we observe systematic changes in the magnetic behavior. As the Nd$^{3+}$ content increases, the initially large spin-freezing region with magnetic frustration becomes smaller and gradually shifts to low temperatures, while the magnetic response gradually increases. The muon-spin spectroscopy measurements on Nd$_4$Ni$_3$O$_8$ show that this phenomenon is likely due to the enhancement of spin fluctuations in Nd$_x$Pr$_{4-x}$Ni$_3$O$_8$, which weakens the spin frustration behavior for high Nd$^{3+}$ contents and at low temperatures. These spin fluctuations can be caused by both Nd and Ni ions and could be one of the factors determining the occurrence of possible superconductivity.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Electronic, Optical and Magnetic Materials
Physical Sciences > Condensed Matter Physics
Language:English
Date:7 July 2023
Deposited On:24 Nov 2023 08:04
Last Modified:29 Jun 2024 01:40
Publisher:American Physical Society
ISSN:2469-9950
OA Status:Green
Publisher DOI:https://doi.org/10.1103/PhysRevB.108.014410
  • Content: Published Version
  • Language: English