## Abstract

Muon spin relaxation studies on La_{1-x}Ca_{x}MnO_{3} (x = 0.33 and 0.67) powders show that the muon dynamic relaxation function changes from exponential above the magnetic transition temperature to stretched exponential below the critical temperature (T_{C} = 274 K for x = 0.33, T_{N} = 150 K for x = 0.67). This suggests a spatially inhomogeneous distribution of very slow Mn-ion correlation times. An anomalously small applied field destroys the dynamical signature of the ferromagnetic transition for x = 0.33, but not the antiferromagnetic transition for x = 0.67. The x = 0.67 system also shows the evidence of a change in the magnetic phase in zero field near T = 75 K.

Original language | English (US) |
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Pages (from-to) | 759-761 |

Number of pages | 3 |

Journal | Physica B: Condensed Matter |

Volume | 230-232 |

DOIs | |

State | Published - Feb 1997 |

Externally published | Yes |

## All Science Journal Classification (ASJC) codes

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

## Keywords

- LaCaMnO
- Magnetoresistive oxides
- Spin polarons
- μSR spectroscopy

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