<P>Hexagonal RMnO<SUB>3</SUB> is a multiferroic compound with a giant spin–lattice coupling at an antiferromagnetic transition temperature, Lee <I>et al</I> (2008 <I>Nature</I> <B>451</B> 805...
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https://www.riss.kr/link?id=A107440910
2017
-
SCI,SCIE,SCOPUS
학술저널
095602
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>Hexagonal RMnO<SUB>3</SUB> is a multiferroic compound with a giant spin–lattice coupling at an antiferromagnetic transition temperature, Lee <I>et al</I> (2008 <I>Nature</I> <B>451</B> 805...
<P>Hexagonal RMnO<SUB>3</SUB> is a multiferroic compound with a giant spin–lattice coupling at an antiferromagnetic transition temperature, Lee <I>et al</I> (2008 <I>Nature</I> <B>451</B> 805). Despite extensive studies over the past two decades, the origin and underlying microscopic mechanism of strong spin–lattice coupling remain very much elusive. In this study, we have tried to address this problem by measuring the thermal expansion and dielectric constant of doped single crystals Y<SUB>1−<I>x</I> </SUB>Lu<SUB> <I>x</I> </SUB>MnO<SUB>3</SUB> where <I>x</I> = 0, 0.25, 0.5, 0.75, and 1.0. From these measurements, we confirm that there is a progressive change in the physical properties with doping. At the same time, all our samples exhibit clear anomalies at <I>T</I> <SUB>N</SUB>, even in the samples where <I>x</I> = 0.5 and 0.75. This is opposed to some earlier ideas, which suggests an unusual doping dependence of the anomaly. Our work reveals yet another interesting facet of the spin–lattice coupling issue in hexagonal RMnO<SUB>3</SUB>.</P>