A surface insulator-to-conductor phase transition in colossal magnetoresistive manganese perovskites thin films

C. N. Borca, Bo Xu, Takashi Komesu, Hae Kyung Jeong, Sy-Hwang Liou, P. A. Dowben

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have observed a distinct surface phase transition for an important class of colossal magnetoresistive materials, La 0.65D 0.35MnO 3 (with D = Sr, Pb) occurring in a surface layer compositionally different from the bulk. The surface phase transition occurs around 240 K compared to 350 K for the bulk and is fundamentally different. In the bulk, a ferromagnetic metal to paramagnetic 'bad metal' occurs, while the lower-temperature surface transition is from an n-type (in case of La 0.65Sr 0.35MnO 3) or a p-type (in case of La 0.65Pb 0.35MnO 3) semiconductor to a semimetal with increasing temperature.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
EditorsJ Amar, G Gilmer, M V Ramana Murty, J Sanchez JR
Volume672
StatePublished - 2001
EventMechanisms of Surface and Microstructure Evolution in Deposited Films and Structures - San Francisco, CA, United States
Duration: Apr 17 2001Apr 20 2001

Other

OtherMechanisms of Surface and Microstructure Evolution in Deposited Films and Structures
CountryUnited States
CitySan Francisco, CA
Period4/17/014/20/01

Fingerprint

Manganese
Phase transitions
Thin films
Metalloids
Ferromagnetic materials
Metals
Semiconductor materials
Temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Borca, C. N., Xu, B., Komesu, T., Jeong, H. K., Liou, S-H., & Dowben, P. A. (2001). A surface insulator-to-conductor phase transition in colossal magnetoresistive manganese perovskites thin films. In J. Amar, G. Gilmer, M. V. Ramana Murty, & J. Sanchez JR (Eds.), Materials Research Society Symposium - Proceedings (Vol. 672)

A surface insulator-to-conductor phase transition in colossal magnetoresistive manganese perovskites thin films. / Borca, C. N.; Xu, Bo; Komesu, Takashi; Jeong, Hae Kyung; Liou, Sy-Hwang; Dowben, P. A.

Materials Research Society Symposium - Proceedings. ed. / J Amar; G Gilmer; M V Ramana Murty; J Sanchez JR. Vol. 672 2001.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Borca, CN, Xu, B, Komesu, T, Jeong, HK, Liou, S-H & Dowben, PA 2001, A surface insulator-to-conductor phase transition in colossal magnetoresistive manganese perovskites thin films. in J Amar, G Gilmer, MV Ramana Murty & J Sanchez JR (eds), Materials Research Society Symposium - Proceedings. vol. 672, Mechanisms of Surface and Microstructure Evolution in Deposited Films and Structures, San Francisco, CA, United States, 4/17/01.
Borca CN, Xu B, Komesu T, Jeong HK, Liou S-H, Dowben PA. A surface insulator-to-conductor phase transition in colossal magnetoresistive manganese perovskites thin films. In Amar J, Gilmer G, Ramana Murty MV, Sanchez JR J, editors, Materials Research Society Symposium - Proceedings. Vol. 672. 2001
Borca, C. N. ; Xu, Bo ; Komesu, Takashi ; Jeong, Hae Kyung ; Liou, Sy-Hwang ; Dowben, P. A. / A surface insulator-to-conductor phase transition in colossal magnetoresistive manganese perovskites thin films. Materials Research Society Symposium - Proceedings. editor / J Amar ; G Gilmer ; M V Ramana Murty ; J Sanchez JR. Vol. 672 2001.
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