Antiferromagnetic transition has soft modulus effect while martensitic transformation is also accompanied by a soft phonon mode.
反铁磁转变存在模量软化，马氏体相变也具有声学软模。
A condensed soft optical phonon mode originates from the triply degenerate symmetric in-plane O-Nb-O bending.
一个软光学声子模来源于在铌-氧平面内的三重简并对称弯曲振动。
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