The Investigation of Structural, Magnetic and Magnetocaloric Properties of (La0.9Er0.1)0.85K0.15MnO3 Manganite Compound

Öz

In this study, the structural, magnetic and magnetocaloric properties of the polycrystalline (La0.9Er0.1)0.85K0.15MnO3 manganite compound synthesized by sol-gel method have been studied. X-ray diffraction measurement at room temperature shows that the sample crystallizes in rhombohedral structure.  The temperature dependence of magnetization measurement reveals that the sample undergoes ferromagnetic-paramagnetic phase transition with increasing temperature. Maximum magnetic entropy change (∆SMmax) of the sample has been calculated as 2.30 Jkg-1K-1 for magnetic field change of 5 T from isothermal magnetization curves.

Anahtar Kelimeler

• Manganite,Magnetocaloric effect,Magnetic refrigeration,Curie temperature

(La0.9Er0.1)0.85K0.15MnO3 Manganit Bileşiğinin Yapısal, Manyetik ve Manyetokalorik Özelliklerinin Araştırılması

Öz

Bu çalışmada, sol-jel yöntemi ile sentezlenen polikristal (La0.9Er0.1)0.85K0.15MnO3 manganit bileşiğinin yapısal, manyetik ve manyetokalorik özellikleri çalışılmıştır. Oda sıcaklığında x-ışını kırınımı ölçümü, numunenin rhombohedral yapıda kristalleştiğini göstermektedir. Sıcaklığa bağlı manyetizasyon ölçümleri, artan sıcaklıkla numunenin ferromanyetik-paramanyetik faz geçişi sergilediğini göstermektedir. Numunenin maksimum manyetik entropi değişimi (∆SMmak.) izotermal mıknatıslanma eğrilerinden 5 T manyetik alan değişimi için 2.30 Jkg-1K-1 olarak hesaplanmıştır.

Anahtar Kelimeler

• Manganit,Manyetokalorik etki,Manyetik soğutma,Curie sıcaklığı

Kaynakça

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