Colossal Magnetoresistance and Charge-ordering in Rare Earth Manganites

2003 ◽  
pp. 297-324
Author(s):  
Bernard Raveau ◽  
Chintamani N. R. Rao
Keyword(s):  
Rare Earth ◽  
Colossal Magnetoresistance ◽  
Charge Ordering ◽  
Rare Earth Manganites

scholarly journals Investigation of Lattice Effects in Rare Earth Manganites by 18O-isotope Exchange

1999 ◽  
Vol 52 (2) ◽  
pp. 235 ◽  
Author(s):  
R. Mahesh ◽  
M. Itoh
Keyword(s):  
Rare Earth ◽  
Colossal Magnetoresistance ◽  
Charge Ordering ◽  
Perovskite Manganites ◽  
Lattice Effects ◽  
Jahn Teller ◽  
18O Isotope ◽  
Ionic Size ◽  
Rare Earth Manganites ◽  
A Site

The strong coupling between the electron spin and lattice arising from the Jahn-Teller effect of manganese ions plays an important role in the mechanism of colossal magnetoresistance and related properties of the rare earth manganites. The lattice effects in this class of oxides have been extensively studied through the application of hydrostatic as well as chemical pressures and magnetic fields. The recently observed giant 18O isotope effect provides direct evidence for the formation of lattice polarons in manganites. Here we report the preliminary results of our investigations on a variety of normal as well as 18O isotope-exchanged perovskite manganites exhibiting colossal magnetoresistance and charge ordering. The observed isotope shift of Tc as well as that of Tco is correlated with the key parameters controlling the lattice such as the Mn 3+ content, the average ionic radius of the A-site cation ⟨rA⟩ , and the A-site ionic size disorder σ2 .

Magnetic Properties and Negative Colossal Magnetoresistance of the Rare Earth Zintl phase EuIn2As2

2008 ◽  
Vol 47 (23) ◽  
pp. 11048-11056 ◽  
Author(s):  
Andrea M. Goforth ◽  
Peter Klavins ◽  
James C. Fettinger ◽  
Susan M. Kauzlarich
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Colossal Magnetoresistance ◽  
Zintl Phase ◽  
The Rare Earth

Synthetic Processes via Complex Precursors of Rare Earth Manganites with the Perovskite and its Related Structures

2004 ◽  
Vol 449-452 ◽  
pp. 725-728 ◽  
Author(s):  
A. Shimono ◽  
Hirohisa Sato ◽  
K. Kawada-Wada ◽  
Yasuo Ito ◽  
Naoki Kamegashira
Keyword(s):  
Rare Earth ◽  
Single Phase ◽  
Solid State Reaction Method ◽  
Rare Earth Complex ◽  
Normal Process ◽  
Composition Region ◽  
Synthetic Process ◽  
Reaction Method ◽  
X Ray ◽  
Rare Earth Manganites

A development of synthetic process via rare earth complex precursors was applied to a formation of rare earth manganites which can not be easily formed by conventional (normal) process. Several compounds of rare earth manganites with various structures were successfully synthesized by this method and their crystal structures were identified by powder X-ray diffractometry. Both of the orthorhombic and rhombohedral LaMnO3phases were prepared. LnMn2O5phase was more easily prepared by this method than by another method. The solid solution of (Sr,La)2MnO4phase for various compositions were tried to prepare a single phase, especially for a composition region Sr/La ratio < 1. since this phase is normally formed for only region of Sr/La ratio .. 1 by the solid state reaction method.

Thermal Diffusivity and Phase Transition of Rare Earth Manganites

2006 ◽  
pp. 1695-1698
Author(s):  
Migaku Kobayashi ◽  
Hirohisa Satoh ◽  
Yoshihiko Hiyoshi ◽  
Naoki Kamegashira ◽  
Doh Jae Lee ◽  
...  
Keyword(s):  
Phase Transition ◽  
Rare Earth ◽  
Thermal Diffusivity ◽  
Rare Earth Manganites
Sign in / Sign up

Export Citation Format

Share Document