Competing spin-glass and spin-fluctuation states in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Nd</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>Pr</mml:mi><mml:mrow><mml:mn>4</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Ni</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>8</mml:mn></mml:msub></mml:mrow></mml:math>

نویسندگان

چکیده

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 ${\mathrm{NdNiO}}_{2}$, bringing the layered rare earth nickel oxides into spotlight. In this report, we present results on a series ${\mathrm{NdNiO}}_{2}$ analogs, ${\mathrm{Nd}}_{x}{\mathrm{Pr}}_{4\ensuremath{-}x}{\mathrm{Ni}}_{3}{\mathrm{O}}_{8}$ ($x=0.1$, 0.25, 1, 2, 4) obtained by topotactic reduction, which observe systematic changes behavior. As ${\mathrm{Nd}}^{3+}$ content increases, initially large spin-freezing region with frustration becomes smaller gradually shifts low temperatures, while response increases. The muon-spin spectroscopy measurements ${\mathrm{Nd}}_{4}{\mathrm{Ni}}_{3}{\mathrm{O}}_{8}$ show that phenomenon is likely enhancement spin fluctuations ${\mathrm{Nd}}_{x}{\mathrm{Pr}}_{4\ensuremath{-}x}{\mathrm{Ni}}_{3}{\mathrm{O}}_{8}$, weakens for high contents at temperatures. These can be caused both Nd Ni ions could one factors determining occurrence possible superconductivity.

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ژورنال

عنوان ژورنال: Physical review

سال: 2023

ISSN: ['0556-2813', '1538-4497', '1089-490X']

DOI: https://doi.org/10.1103/physrevb.108.014410