Pressure effect on electrical resistivity of

✍ Scribed by T. Nakama; Y. Takaesu; K. Yagasaki; E. Sakai; N. Kurita; M. Hedo; Y. Uwatoko; A.T. Burkov

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 99 KB
• Volume: 378-380
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2006.01.001

✦ Synopsis

Electrical resistivity of Y 1Àx Gd x Co 2 alloy system has been measured at temperatures from 2 to 300 K in magnetic field up to 15 T and under pressure up to 10 GPa. The compounds with the composition near to phase boundary between paramagnetic and ferromagnetic ground state (x c % 0:12) show strong enhancement of electrical resistivity at low temperatures. Large positive magnetoresistance was observed in ferromagnetic alloys in composition range 0:15oxo0:3. The anomalous magnetoresistance as well as the composition dependence of the low-temperature resistivity were explained by an interplay of metamagnetic instability of Co 3d itinerant electrons and structural disorder within rare-earth sublattice. The pressure effect on electrical resistivity for Y 1Àx Gd x Co 2 at low temperatures is in agreement with the variation of magnetoresistance with the composition.