Gapped and gapless short range ordered magnetic states with $(\frac{1}{2},\frac{1}{2},\frac{1}{2})$ wavevectors in the pyrochlore magnet Tb${}_{2+x}$Ti${}_{2-x}$O${}_{7+\delta }$

E. Kermarrec, D. D. Maharaj, J. Gaudet +9

Recent low temperature heat capacity (C${}_P$) measurements on polycrystalline samples of the pyrochlore antiferromagnet Tb${}_{2+x}$Ti${}_{2-x}$O${}_{7+\delta }$ have shown a strong sensitivity…