## Abstract

Anomalous magneto-elastic property of interacting multipoles is investigated with account of fluctuation effects. We use two complementary methods both of which deal with fluctuation effects beyond the mean-field theory. One is to take the two-site model which has a multipolar coupling between them and to solve the model exactly. The other approach is to take the effective medium theory for the lattice system. It takes into account fluctuations up to O(1/z_{n}) around the mean-field theory where z_{n} is the number of interacting neighbors. In the latter approach, it is found that some components of the local strain susceptibility increase as the fluctuation is suppressed by a magnetic field. This leads to increase of corresponding uniform strain susceptibility, and softening of the corresponding elastic constant.

Original language | English |
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Pages (from-to) | 538-539 |

Number of pages | 2 |

Journal | Physica B: Condensed Matter |

Volume | 281-282 |

DOIs | |

Publication status | Published - 2000 Jun 1 |

Event | Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) - Nagano, Jpn Duration: 1999 Aug 24 → 1999 Aug 28 |

## ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering