## Özet

Gd_{5}Si_{2}Ge_{2} was alloyed with varying amounts of Ga to study its influence on the giant magnetocaloric effect. Investigations on Gd_{5}(Si_{2-x}Ge_{2-x})Ga_{2x} with 2x = 0.03, 0.05 and 0.13 were carried out using X-ray powder diffraction, temperature and magnetic field dependent magnetization measurements, and differential scanning calorimetry. We observe that as the Ga content increases, the temperature stability range of the monoclinic phase narrows, and the orthorhombic structure gains stability. This is expected to be related to the decrease in the (Si/Ge){single bond}(Si/Ge) bond distance in the monoclinic phase. The maximum entropy change for the parent compound at 270 K was found to be 9.8 J kg^{-1} K^{-1} in an applied field of 5 T. For 2x = 0.03, this value reduces to 8.5 J kg^{-1} K^{-1}, and the temperature corresponding to the maximum entropy change shifts marginally to 278 K. For other 2x values, the maximum entropy change further decreases.

Orijinal dil | İngilizce |
---|---|

Sayfa (başlangıç-bitiş) | 94-98 |

Sayfa sayısı | 5 |

Dergi | Journal of Alloys and Compounds |

Hacim | 460 |

Basın numarası | 1-2 |

DOI'lar | |

Yayın durumu | Yayınlandı - 28 Tem 2008 |

Harici olarak yayınlandı | Evet |

### Finansman

We acknowledge gratefully P. Hinkel for compositional analysis. This work was supported by the Scientific and Technological Research Council of Turkey under project No. 104T382, Forshungszentrum Jülich under project No. WTZ TUR 04/011 and CICyT (Spain) project No. MAT2004-1291. XM acknowledges support from DGICyT (Spain).

Finansörler | Finansör numarası |
---|---|

DGICyT | |

Forshungszentrum Jülich | WTZ TUR 04/011 |

Türkiye Bilimsel ve Teknolojik Araştirma Kurumu | 104T382 |

Comisión Interministerial de Ciencia y Tecnología | MAT2004-1291 |

## Parmak izi

The influence of gallium on the magnetocaloric properties of Gd_{5}Si

_{2}Ge

_{2}' araştırma başlıklarına git. Birlikte benzersiz bir parmak izi oluştururlar.