NMR Study on Spin Gap in Spin Ladder Sr14Cu24O41

Sigenori Tsuji, Ken Ichi Kumagai, Masatsune Kato, Yoji Koike

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

We have investigated spin dynamics of both the ladder and the chain sites in Sr14Cu24O41 by Cu-NMR and Cu-NQR. From the NMR shift, Kspin, and nuclear spin-lattice relaxation time, T1, the energy gaps in the spin excitation spectrum are confirmed to be Δ = 140 K for the chain site and Δ = 470 K for the ladder site for Sr14Cu24O41 . Doping effects on the spin gaps and electric field gradient at the Cu sites were also investigated by the substituting of Ca, Y and La for Sr. The spin gap of the ladder site decreases with increasing x for Sr14-xCaxCu24O41 and seems to collapse at around x = 13 for Ca substitution.

Original languageEnglish
Pages (from-to)3474-3477
Number of pages4
Journaljournal of the physical society of japan
Volume65
Issue number11
DOIs
Publication statusPublished - 1996 Jan 1

Keywords

  • NMR
  • NQR
  • Nuclear spin-lattice relaxation time
  • Spin gap
  • Spin ladder
  • SrCuO

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'NMR Study on Spin Gap in Spin Ladder Sr<sub>14</sub>Cu<sub>24</sub>O<sub>41</sub>'. Together they form a unique fingerprint.

Cite this