In samarium-based infinite-layer nickelates, the measured exchange coupling is about 20% smaller than in praseodymium-based nickelates despite a nearly two-fold higher Tc, opposite to the trend in cuprates.
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Persistent paramagnons in high-temperature infinite-layer nickelate superconductors
In samarium-based infinite-layer nickelates, the measured exchange coupling is about 20% smaller than in praseodymium-based nickelates despite a nearly two-fold higher Tc, opposite to the trend in cuprates.