Spectacular Increase of Resistivity by Thermal Cycling under a Magnetic Field in Pr0.5Ca0.5Mn0.99Cr0.01O3

✍ Scribed by R. Mahendiran; A. Maignan; M. Hervieu; C. Martin; B. Raveau

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 241 KB
• Volume: 160
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2001.9203

✦ Synopsis

The resistivity of Pr 0.5 Ca 0.5 Mn 0.99 Cr 0.01 O 3 under H ‫؍‬ 4 T shows unusual instability against thermal cycling between 250 and 5 K. The resistivity at 10 K change from 100 cm in the 5rst cycle to more than 10 6 cm in the 5fth cycle. However, magnetization decreases only by 1.2% between the 5rst and the 5fth cycles. The unusual enhancement of resistivity is suggested to be due to strain-induced localization of charge carriers.