Pressure Dependence of the 100 K Spin-State Transition in LaCoO₃

Magnetic and transport properties in La1−Pr CoO3 single crystals

“…The temperature of the maximum in w(T) increases with Pr content, suggesting that the transition temperature from LS to IS state increases by the Pr substitution. It mimics the hydrostatic pressure effect on the LS-IS transition in LaCoO 3 [6]. The increment of LS-IS transition temperature might be due to the chemical pressure effect since the ion radius of Pr 3+ is smaller than that of La 3+ .…”

Temperature- and pressure-induced spin-state transitions inLaCoO3

“…The effect of pressure to the 90-K transition was studied up to 18 kbar by Asai et al, who found that the energy gap between the LS and the higher spin state increases with pressure. 18 Recently, Vogt et al performed an X-ray powder diffraction study to examine the pressure-induced changes. The results were interpreted as a continuous transition from IS to LS state, which is completed at around 40 kbar.…”

Cation size effect on the thermochromic properties of rare earth cobaltitesRECoO3(RE: La, Nd, Sm)

“…An explanation for the shift in transition temperature is suggested by a study of LaCoO 3 under hydrostatic pressure. 14 It was found that the LS to IS transition, detected by magnetization, shifts rapidly to higher temperatures with decreasing volume. The shift could be understood in terms of the volume dependence of the energy difference between the LS and IS states.…”