PHYS07200604007 Manas Kumar Dala - Homi Bhabha National ...
PHYS07200604007 Manas Kumar Dala - Homi Bhabha National ...
PHYS07200604007 Manas Kumar Dala - Homi Bhabha National ...
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List of Figures<br />
1.1 Temperature dependence of the resistivity of La 1−x Sr x MnO 3 (x =<br />
0.175) under various magnetic fields [2]. . . . . . . . . . . . . . . . . . 4<br />
1.2 Schematic view of the cubic perovskite structure. . . . . . . . . . . . 5<br />
1.3 Phase diagram of temperature versus tolerance factor for the system<br />
R 0.7 A 0.3 MnO 3 , where R is a trivalent rare earth ion and A is a divalent<br />
alkaline earth ion [12]. . . . . . . . . . . . . . . . . . . . . . . . . . . 6<br />
1.4 A schematic of the electronic structure of Mn 3+ (a) and Mn 4+ (b). . . 7<br />
1.5 Schematic features of the double exchange mechanism. . . . . . . . . 8<br />
1.6 Schematic view of the Jahn-Teller effect for the d 4 ion. . . . . . . . . 9<br />
1.7 Schematic representation of a macroscopic phase separated state (a),<br />
as well as possible charge inhomogeneous states stabilized by the longrange<br />
Coulomb interaction (spherical droplets in (b), stripes in (c))<br />
[20]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10<br />
1.8 Different types of spin arrangements. . . . . . . . . . . . . . . . . . . 11<br />
1.9 A Schematic picture of antiferromagnetic CE-type structure with the<br />
charge and e g orbital ordering. . . . . . . . . . . . . . . . . . . . . . . 12<br />
1.10 A schematic picture of the antiferromagnetic pseudo-CE-type structure<br />
in the case of Pr 1−x Ca x MnO 3 (x = 0.4) [38]. . . . . . . . . . . . . . . 13<br />
xvii