Magnetic properties of the (LaMnO3)N/(SrTiO 3)N atomic layer superlattices

Xiaofang Zhai, Chandra S. Mohapatra, Amish B. Shah, Jian Min Zuo, James N. Eckstein

Research output: Contribution to journalArticlepeer-review

Abstract

We studied the magnetic properties of atomic layer superlattices of (LaMnO3)N/(SrTiO3)N (N 1,2,8) fabricated by ozone-assisted atomic layer-by-layer molecular beam epitaxy. Compared to a reference LaMnO3 thin film, the N 8 superlattice exhibits enhanced magnetization, while the N 1 and 2 superlattices exhibit suppressed magnetization. The onset temperature of the ferromagnetic transition is lowered in all superlattices. Moreover, the Brillouin function fits to the magnetic hysteresis curves indicate that the ground state of the superlattices consists of non-uniform spin interactions. The electric transport measurements suggest a very small variation of Mn valence (∼±0.015) that may not be enough to induce the observed large change in the magnetic property.

Original languageEnglish (US)
Article number173913
JournalJournal of Applied Physics
Volume113
Issue number17
DOIs
StatePublished - May 7 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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