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Phys. Rev. B 58, 8760–8772 (1998)

Muon spin relaxation study of the stripe phase order in La1.6-xNd0.4SrxCuO4 and related 214 cuprates

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B. Nachumi, Y. Fudamoto, A. Keren*, K. M. Kojima†, M. Larkin, G. M. Luke, J. Merrin, O. Tchernyshyov, and Y. J. Uemura
Physics Department, Columbia University, New York, New York 10027

N. Ichikawa, M. Goto, H. Takagi, and S. Uchida
Department of Superconductivity, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan

M. K. Crawford and E. M. McCarron
DuPont, Wilmington, Delaware 19880-0356

D. E. MacLaughlin
Department of Physics, University of California, Riverside, California 92521

R. H. Heffner
MS K764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

Received 23 April 1998; published in the issue dated 1 October 1998

We present zero-field muon spin relaxation (μSR) measurements of La1.6-xNd0.4SrxCuO4 with x=0.125,0.15,0.2;La1.475Nd0.4Ba0.125CuO4,La1.875Ba0.125CuO4, and La1.875Ba0.125-ySryCuO4 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 TN≈30K, with a T⃗0 ordered Cu moment ≈0.3μB. 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 μSR hysteresis measurements of the La1.45Nd0.4Sr0.15CuO4 and La1.4Nd0.4Sr0.2CuO4 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.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.58.8760
DOI:
10.1103/PhysRevB.58.8760
PACS:
74.62.Dh, 74.25.Ha, 74.72.-h

*Present address: Technion, Haifa 32000, Israel.

†Present address: Department of Superconductivity, University of Tokyo, Bunkyo-ku, Tokyo, Japan.

 
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