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The wave vector(q)- and energy(w)-dependent magnetic excitation spectrac"(q,w), have been studied in the temperature(T) range of 10 K<T<150 K onsingle crystals of La1.48Nd0.4Sr0.12CuO4, which has the static "stripe" orderin the low temperature phase. The incommensurability d of the peak of c"(q,w)found by the q-scans and the peak width Dq exhibit characteristicT-dependences. Observed profiles show clear incommensurate structure even atrather high temperatures. The results indicate that effects of the slowlyfluctuating "stripes" exist not only in the low temperature tetragonal (LTT)phase but also in the orthorhombic phase(LTO1) of the present system. Thepersistence of the local structural characteristics of the low-T phase seems tobe important.Comment: 9 pages, 6 figure

Effects of “Stripes” on the Magnetic Excitation Spectra of La1.48Nd0.4Sr0.12CuO4

Effects of “Stripes” on the Magnetic Excitation Spectra of La_1.48Nd_0.4Sr_0.12CuO₄