{
  "id": "1406.0194",
  "version": "v1",
  "published": "2014-06-01T19:26:41.000Z",
  "updated": "2014-06-01T19:26:41.000Z",
  "title": "Effect of carrier concentration on magnetism and magnetic order in the pyrochlore iridates",
  "authors": [
    "M. J. Graf",
    "S. M. Disseler",
    "Chetan Dhital",
    "T. Hogan",
    "M. Bojko",
    "A. Amato",
    "H. Luetkens",
    "C. Baines",
    "D. Margineda",
    "S. R. Giblin",
    "M. Jura",
    "Stephen D. Wilson"
  ],
  "categories": [
    "cond-mat.str-el"
  ],
  "abstract": "We present resistivity, magnetization, and zero field muon spin relaxation ($\\mu$SR) data for the pyrochlore iridate materials Nd$_{2-x}$Ca$_{x}$Ir$_{2}$O$_{7}$ ($x = 0, 0.06$, and $0.10$) and Sm$_2$Ir$_2$O$_7$. While Nd$_{2}$Ir$_{2}$O$_{7}$ (Nd227) is weakly conducting, Sm$_{2}$Ir$_{2}$O$_{7}$ (Sm227) has slowly diverging resistivity at low temperature. Nd227 and Sm227 exhibit magnetic anomalies at $T_{M} = 105 K$ and $137 K$, respectively. However, zero-field $\\mu$SR measurements show that long-range magnetic order of the Ir$^{4+}$ sublattice sets in at much lower temperatures ($T_{LRO} \\sim 8 K$ for Nd227 and $70 K$ for Sm227); both materials show heavily damped muon precession with a characteristic frequency near 9 MHz. The magnetic anomaly at $T_{M}$ in Nd227 is not significantly affected by the introduction of hole carriers by Ca-substitution in the conducting Nd$_{2-x}$Ca$_{x}$Ir$_{2}$O$_{7}$ samples, but the muon precession is fully suppressed for both.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-06-01T19:26:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnetic order",
      "carrier concentration",
      "zero field muon spin relaxation",
      "muon precession",
      "pyrochlore iridate materials nd"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014arXiv1406.0194G"
    }
  }
}