Concurrent transition of ferroelectric and magnetic ordering near room temperature

Kyung Tae Ko, Min Hwa Jung, Qing He, Jin Hong Lee, Chang Su Woo, Kanghyun Chu, Jan Seidel, Byung Gu Jeon, Yoon Seok Oh, Kee Hoon Kim, Wen I. Liang, Hsiang Jung Chen, Ying-hao Chu, Yoon Hee Jeong, Ramamoorthy Ramesh, Jae Hoon Park*, Chan Ho Yang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

118 Scopus citations

Abstract

Strong spin-lattice coupling in condensed matter gives rise to intriguing physical phenomena such as colossal magnetoresistance and giant magnetoelectric effects. The phenomenological hallmark of such a strong spin-lattice coupling is the manifestation of a large anomaly in the crystal structure at the magnetic transition temperature. Here we report that the magnetic Néel temperature of the multiferroic compound BiFeO3 is suppressed to around room temperature by heteroepitaxial misfit strain. Remarkably, the ferroelectric state undergoes a first-order transition to another ferroelectric state simultaneously with the magnetic transition temperature. Our findings provide a unique example of a concurrent magnetic and ferroelectric transition at the same temperature among proper ferroelectrics, taking a step toward room temperature magnetoelectric applications.

Original languageEnglish
Article number567
Number of pages8
JournalNature Communications
Volume2
Issue number1
DOIs
StatePublished - 6 Dec 2011

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