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CeRu$$_2$$Al$$_2$$B; A Local-moment 4$$f$$ magnet with a complex $$T$$-$$H$$ phase diagram

Raumbach, R. E.*; Chudo, Hiroyuki ; Yasuoka, Hiroshi; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

The temperature-magnetic field ($$T$$-$$H$$) phase diagram for the tetragonal compound CeRu$$_2$$Al$$_2$$B, determined from magnetization, specific heat, nuclear magnetic resonance (NMR), and electrical resistivity is reported. This system exhibits localized 4$$f$$ magnetic ordering at high temperatures where antiferromagnetism is observed at a N${'e}$el temperature $$T$$$$_{rm N}$$ = 14.2 K and a first-order ferromagnetic transition is observed at a Curie temperature $$T$$$$_{rm c}$$ = 12.8 K. The application of a magnetic field $$H$$ results in a rich phase diagram that includes three magnetically ordered phase: (1) antiferromagnetic, (2) canted antiferromagnetic, and (3) ferromagnetic, indicating that there are several finely tuned exchange interaction.

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Percentile:75.38

Category:Materials Science, Multidisciplinary

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