TbFeO3 shows a tiny volume increase on cooling, phonon anomalies beyond anharmonic decay, and a new Raman mode emerging below about 175 K, attributed to spin-lattice coupling without a structural transition.
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Negative thermal expansion, lattice dynamics, and complex magnetism in TbFeO$_3$
TbFeO3 shows a tiny volume increase on cooling, phonon anomalies beyond anharmonic decay, and a new Raman mode emerging below about 175 K, attributed to spin-lattice coupling without a structural transition.