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Magnetic properties of the spinel AYb$$_2$$Se$$_4$$ (A=Cd, Mg) probed by $$mu$$SR

Higemoto, Wataru  ; Ito, Takashi   ; Iritani, Kenshi*; Halim, M.*; Nakatsuji, Satoru*

A spinel structural system shows a variety of the magnetic state due to its frustration effect. Up to now, we have studied the magnetic ground state of spinel structural system AYb$$_2$$S$$_4$$(A=Cd, Mg) by using muon spin relaxation method and observed the appearance of the magnetic ordering state below 2K in CdYb$$_2$$S$$_4$$ and 1.5K in MgYb$$_2$$S$$_4$$. For systematic study of the frustration effect, we are measuring muon spin relaxation in same structural compounds AYb$$_2$$Se$$_4$$ (A=Cd, Mg). In CdYb$$_2$$Se$$_4$$, the local magnetic field was observed below 2K. In the presentation, we will discuss the detail of the magnetic state.

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