| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1798581 | Journal of Magnetism and Magnetic Materials | 2015 | 7 Pages |
•Magnetic field induced energy level crossing is reported for NH4CuPO4·H2O.•Magnetic data are analyzed within the framework of spin 1/2 dimer model.•Singlet-triplet transition is captured employing quantum complementarity principle.•Field dependent specific heat data also provides the signature of the transition.
Experimental realization of magnetic field induced singlet to triplet transition is reported for NH4CuPO4·H2O, a two spin cluster material with isotropic Heisenberg interaction. Experimental magnetization and specific heat data have been collected as a function of temperature and magnetic field. Experimental data have been analyzed in terms of Heisenberg dimer model. Two quantum complementary observables representing local and non-local properties of the spins are constructed using the experimental data and a clear evidence of singlet to triplet transition is observed through partial quantum information sharing when the magnetic field is swept through a particular value. Signature of this transition has also been captured when specific heat is measured as a function of magnetic field. Furthermore, using the experimental specific heat data, magnetic energy values are calculated and their variations are captured as a function of magnetic field and temperature.
