Concentration Magnetic Phase Transitions in the (La1−xCaxMnO3 System

✍ Scribed by Dr. V. I. Pavlov; Dr. G. L. Bychkov; Dr. A. K. Bogush

• Publisher: John Wiley and Sons
• Year: 1986
• Tongue: English
• Weight: 445 KB
• Volume: 21
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.2170210411

✦ Synopsis

Comprehensive investigations into crystal structures, electrical and magnetic properties of the (Lal-,Ca,)MnO, (z = 0 f 0.6) solid solutions are performed. Two concentration magnetic phase transitions are found : antiferromagnetic-ferromagnetic with x = 0.14 and ferromagnetic (T, = 150 K)ferromagnetic (T, = 260 K) at f = 0.2. It is shown that the first of them is due to the crystal structure 0'-0 orthorhombic transition, the secondto the increase of ferromagnetic interaction at the expense of additional interaction through conduction electrons. A diagram of the magnetic states for (La1 -,Ca,)MnO, at z = 0 + 0.6 is given.