### Abstract

Measurements of magnetic susceptibility, specific heat and inelastic neutron scattering were performed on a Zn-substituted spin-1/2 Heisenberg 2-leg ladder compound Sr(Cu_{1-x}Zn_{x})_{2}O_{3} (x ≤ 0.08) to investigate nonmagnetic impurity effects on the quantum spin system with a large spin gap of about ∼ 400 K. A clear anomaly attributed to the onset of antiferromagnetic ordering was observed both in the magnetic susceptibility and specific heat data even at only 1 % of Zn. The Néel temperature showed a systematic Zn-concentration dependence with a broad maximum at around 4 % substitution (T_{Nmax} ∼ 8K). A finite amount of T-linear term with a coefficient of γ ∼ 3.5 mJ/K^{2} was observed in the specific heat above T_{N} for x = 0.02 and 0.04, suggesting the existence of a finite density of states at E = 0 in the spin excitation spectrum as supported by the inelastic neutron scattering measurement.

Original language | English |
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Pages (from-to) | 149-152 |

Number of pages | 4 |

Journal | Physica C: Superconductivity and its Applications |

Volume | 282-287 |

Issue number | PART 1 |

Publication status | Published - Aug 1997 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Condensed Matter Physics

### Cite this

*Physica C: Superconductivity and its Applications*,

*282-287*(PART 1), 149-152.