scholarly journals Metal–insulator transition induced by 16O–18O oxygen isotope exchange in colossal negative magnetoresistance manganites

1998 ◽  
Vol 83 (11) ◽  
pp. 7369-7371 ◽  
Author(s):  
N. A. Babushkina ◽  
L. M. Belova ◽  
V. I. Ozhogin ◽  
O. Yu. Gorbenko ◽  
A. R. Kaul ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Isotope Exchange ◽  
Insulator Transition ◽  
Negative Magnetoresistance ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Oxygen Isotope Exchange

Metal–insulator transition induced by oxygen isotope exchange in the magnetoresistive perovskite manganites

Nature ◽  
10.1038/34380 ◽  
1998 ◽  
Vol 391 (6663) ◽  
pp. 159-161 ◽  
Author(s):  
N. A. Babushkina ◽  
L. M. Belova ◽  
O. Yu. Gorbenko ◽  
A. R. Kaul ◽  
A. A. Bosak ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Isotope Exchange ◽  
Insulator Transition ◽  
Perovskite Manganites ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Oxygen Isotope Exchange

Oxygen-isotope effect on the field-induced metal-insulator transition in

1998 ◽  
Vol 105 (9) ◽  
pp. 567-570 ◽  
Author(s):  
B. García-Landa ◽  
M.R. Ibarra ◽  
J.M. De Teresa ◽  
Guo-meng Zhao ◽  
K. Conder ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Isotope Effect ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator

scholarly journals Colossal Isotope Shift of the Metal-Insulator Transition Temperature in Epitaxial Thin Films of (La1-y Pry)0·7Ca0·3MnO3

1999 ◽  
Vol 52 (2) ◽  
pp. 269 ◽  
Author(s):  
O. Yu. Gorbenko ◽  
A. R. Kaul ◽  
N. A. Babushkina ◽  
L. M. Belova ◽  
B. Guettler
Keyword(s):  
Lattice Dynamics ◽  
Room Temperature ◽  
Lattice Strain ◽  
Insulator Transition ◽  
Perovskite Manganites ◽  
Epitaxial Thin Films ◽  
Raman Spectrometry ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Oxygen Isotope Exchange

A colossal shift of the maximum resistivity temperature induced by oxygen isotope exchange was registered for 60 nm thick films of the solid solution La0·35Pr0·35Ca0·3MnO3 on perovskite substrates. The magnitude of the effect depends on lattice strain resulting in the largest shift for the film on LaAlO3: the 16O sample showed a metal-insulator transition at 182 K, whereas the 18O sample was insulating down to 4·2 K, which is the highest difference ever reported for CMR manganites. An XRD and Raman spectrometry study indicates no difference in chemical composition or structure for the 18O and 16O samples at room temperature. The results are consistent with the model coupling the metal-insulator transition in the perovskite manganites to the lattice dynamics.

Sign in / Sign up

Export Citation Format

Share Document