Anomalies of magnetoelastic properties and insulator-metal phase transitions induced by a magnetic field in substituted praseodymium manganites

• DOI: 10.1134/1.1395097
• Publication Date: 2002-07-27T10:17:49Z
• Authors: Yu. F. Popov; A. M. Kadomtseva; G. P. Vorob’ev; K. I. Kamilov; V. Yu. Ivanov; A. A. Mukhin; A. M. Balbashov
• Keywords: 0103 physical sciences; 01 natural sciences

The magnetostriction of Pr0.6Ca0.4MnO3 and Pr0.65Ca0.28Sr0.07MnO3 manganite crystals is investigated in pulsed magnetic fields up to 250 kOe. The field-induced phase transitions from the charge-ordered antiferromagnetic (paramagnetic) state to the metallic ferromagnetic state are studied. It is found that these transitions are accompanied by abrupt negative jumps in the longitudinal and transverse magnetostrictions and a strong hysteresis at low temperatures. The threshold fields of transitions are determined, and the H-T phase diagrams are constructed.