TY - JOUR
T1 - Magnetic properties of Sr0.78Y0.22CoO 3-δ under high pressure
AU - Matsunaga, Takahiro
AU - Kida, Takanori
AU - Kimura, Shojiro
AU - Hagiwara, Masayuki
AU - Yoshida, Shin
AU - Terasaki, Ichiro
PY - 2010
Y1 - 2010
N2 - We have investigated the temperature dependence of magnetization in a polycrystalline sample of Sr0.78Y0.22CoO 3-δ under high pressure of up to 0.52 GPa. It turned out that this sample shows the large pressure dependence of Tc and magnetization. We found that the pressure derivative of TC, dT C/dP, is -432 K/GPa for P < 0.1 GPa and -14 K/GPa for P > 0.1 GPa. From comparison with Ca-substituted samples, we evaluate the bulk modulus to be 83 GPa. The large pressure dependence is attributed to the small bulk modulus of this oxide and sensitive spin states of Co ions.
AB - We have investigated the temperature dependence of magnetization in a polycrystalline sample of Sr0.78Y0.22CoO 3-δ under high pressure of up to 0.52 GPa. It turned out that this sample shows the large pressure dependence of Tc and magnetization. We found that the pressure derivative of TC, dT C/dP, is -432 K/GPa for P < 0.1 GPa and -14 K/GPa for P > 0.1 GPa. From comparison with Ca-substituted samples, we evaluate the bulk modulus to be 83 GPa. The large pressure dependence is attributed to the small bulk modulus of this oxide and sensitive spin states of Co ions.
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U2 - 10.1088/1742-6596/200/1/012116
DO - 10.1088/1742-6596/200/1/012116
M3 - Conference article
AN - SCOPUS:77957057768
SN - 1742-6588
VL - 200
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - SECTION 1
M1 - 012116
ER -