Статья

Muon spin relaxation study of the stripe phase order in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>1.6</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Nd</mml:mi></mml:mrow><mml:mrow><mml:mn>0.4</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CuO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>and related 214 cuprates

B. NachumiPhysics Department, Columbia University, New York, New York 10027Y. FudamotoPhysics Department, Columbia University, New York, New York 10027Amit KerenPhysics Department, Columbia University, New York, New York 10027Kenji KojimaPhysics Department, Columbia University, New York, New York 10027M. LarkinPhysics Department, Columbia University, New York, New York 10027G. M. LukePhysics Department, Columbia University, New York, New York 10027J. MerrinPhysics Department, Columbia University, New York, New York 10027Oleg TchernyshyovPhysics Department, Columbia University, New York, New York 10027Y. J. UemuraPhysics Department, Columbia University, New York, New York 10027Noriya IchikawaPhysics Department, Columbia University, New York, New York 10027Masahiro GotoPhysics Department, Columbia University, New York, New York 10027H. TakagiPhysics Department, Columbia University, New York, New York 10027S. UchidaPhysics Department, Columbia University, New York, New York 10027M. K. CrawfordPhysics Department, Columbia University, New York, New York 10027E. M. McCarronPhysics Department, Columbia University, New York, New York 10027D. E. MacLaughlinPhysics Department, Columbia University, New York, New York 10027R. H. HeffnerPhysics Department, Columbia University, New York, New York 10027

1998lv

ABI

Аннотация

We present zero-field muon spin relaxation (\ensuremath{\mu}SR) measurements of ${\mathrm{La}}_{1.6\ensuremath{-}x}{\mathrm{Nd}}_{0.4}{\mathrm{Sr}}_{x}{\mathrm{CuO}}_{4}$ with $x=0.125,0.15,0.2;{\mathrm{La}}_{1.475}{\mathrm{Nd}}_{0.4}{\mathrm{Ba}}_{0.125}{\mathrm{CuO}}_{4},{\mathrm{La}}_{1.875}{\mathrm{Ba}}_{0.125}{\mathrm{CuO}}_{4},$ and ${\mathrm{La}}_{1.875}{\mathrm{Ba}}_{0.125\ensuremath{-}y}{\mathrm{Sr}}_{y}{\mathrm{CuO}}_{4}$ with $y=0.025,0.065.$ All of the samples with dopant concentrations $x+y<~0.15$ show similar static magnetic order with coherent precession of the muon spins below ${T}_{N}\ensuremath{\approx}30\mathrm{K},$ with a $\stackrel{\ensuremath{\rightarrow}}{T}0$ ordered Cu moment $\ensuremath{\approx}0.3{\ensuremath{\mu}}_{B}.$ The samples with $x=0.20$ show no coherent precession but manifest two distinct relaxation regimes, typical of quasistatic magnetism. We then present transverse-field \ensuremath{\mu}SR hysteresis measurements of the ${\mathrm{La}}_{1.45}{\mathrm{Nd}}_{0.4}{\mathrm{Sr}}_{0.15}{\mathrm{CuO}}_{4}$ and ${\mathrm{La}}_{1.4}{\mathrm{Nd}}_{0.4}{\mathrm{Sr}}_{0.2}{\mathrm{CuO}}_{4}$ systems that show a large superconducting response below approximately 7 K and 12 K, respectively. We argue that superconductivity and magnetic order coexist in the $x=0.15$ system.

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Идентификаторы

DOI: 10.1103/physrevb.58.8760

Цитирования и источники

Цитирований: 4Использованных источников: 0

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