Steplike lattice deformation of single crystalline (La0.4Pr0.6)1.2Sr1.8Mn2O7 bilayered manganite.
We report a steplike lattice transformation of single crystalline (La0.4Pr0.6)1.2Sr1.8Mn2O7 bilayered manganite accompanied by both magnetization and magnetoresistive jumps, and examine the ultrasharp nature of the field-induced first-order transition from a paramagnetic insulator to a ferromagnetic metal phase accompanied by a huge decrease in resistance. Our findings support that the abrupt magnetostriction is closely related to an orbital frustration existing in the inhomogeneous paramagnetic insulating phase rather than a martensitic scenario between competing two phases.
Department of Materials Science and Technology, Iwate University, Morioka 020-8551, Japan. matsukawa@iwate-u.ac.jp
M
M
Matsukawa
Y
Y
Yamato
T
T
Kumagai
A
A
Tamura
R
R
Suryanarayanan
S
S
Nimori
M
M
Apostu
A
A
Revcolevschi
K
K
Koyama
N
N
Kobayashi