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Entropy Evolution in the Magnetic Phases of Partially Frustrated CePdAl
S Lucas1,2, K Grube3, C-L Huang1,3,4
1Max-Planck-Institut für Chemische Physik fester Stoffe, 01187 Dresden, Germany.
In CePdAl, magnetic fields suppress the Kondo effect, revealing enhanced magnetic entropy and frustration. This field range shows promise for discovering quantum spin liquids.
Area of Science:
- Condensed Matter Physics
- Quantum Materials Research
Background:
- Heavy-fermion metals like CePdAl exhibit complex magnetic order and geometric frustration.
- The Kondo effect typically screens magnetic moments in such systems at low temperatures.
Purpose of the Study:
- To investigate the magnetic phase diagram and entropy evolution in CePdAl under applied magnetic fields.
- To explore the interplay between Kondo screening, magnetic frustration, and quantum spin liquid states.
Main Methods:
- Utilized thermodynamic probes to measure magnetic phase diagrams and entropy.
- Applied magnetic fields (B) to suppress the Kondo effect and liberate frustrated Ce moments.
Main Results:
- Observed suppression of Kondo screening in specific magnetic field ranges.
- Quantified enhanced magnetic entropy and frustration, linked to liberated Ce moments.
- Introduced a frustration parameter based on enhanced entropy.
Conclusions:
- The field range with suppressed Kondo screening enhances frustration, presenting a potential avenue for quantum spin liquid research.
- CePdAl's frustrated moments and tunable Kondo effect make it a candidate for exploring exotic quantum states.
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