The effect of the substitution of Cu for Ni on magnetoresistance and magnetocaloric properties of Ni50Mn34In16

DİNÇER İ., Yüzüak E., Elerman Y.

Journal of Alloys and Compounds, cilt.509, sa.3, ss.794-799, 2011 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 509 Sayı: 3
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.jallcom.2010.09.092
  • Dergi Adı: Journal of Alloys and Compounds
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.794-799
  • Anahtar Kelimeler: Magnetocaloric effect, Magnetoresistance, Magnetostructural transition
  • Ankara Üniversitesi Adresli: Evet

Özet

The effect of the substitution of Cu for Ni on the magnetoresistance behaviour and the magnetocaloric properties of the Ni50Mn 34In16 alloy has been investigated. The (Ni-Cu) 50Mn34In16 alloys crystallize in the cubic L21 structure in austenite phase. While the Ms temperature is about 160 K for the Ni47.5Cu2.6Mn 34.0In15.9 alloy, the martensitic transition is not observed for Ni45.5Cu4.6Mn33.8In16.1 alloy. To estimate the magnetic entropy change of the Ni47.5Cu 2.6Mn34.0In15.9 alloy, the magnetization measurements as function of magnetic field are performed by continuous and noncontinuous heating methods. The Ni47.5Cu2.6Mn 34.0In15.9 alloy shows the magnetostructural transition whose irreversible ratio is about 50% at 160 K. The magnetocaloric effect strongly depends on the sample history due to the occurrence of the irreversible magnetostructural transition. For the magnetic field change of 2 T, giant magnetoresistance value is about -68% that is rather big among the similar bulk alloys. © 2010 Elsevier B.V. All rights reserved.