TY - JOUR
T1 - Resistivity and AC calorimetry measurements on CeNiGe2 under pressure
AU - Holmes, A.T.
AU - Muramatsu, T.
AU - Miyake, A.
AU - Kaczorowski, D.
AU - Kagayama, T.
AU - Shimizu, K.
AU - Bukowski, Z.
PY - 2007/3/1
Y1 - 2007/3/1
N2 - We present resistivity and AC calorimetry measurements of single crystalline CeNiGe2 under high pressure and low temperature in a diamond anvil cell. CeNiGe2 is a highly anisotropic, antiferromagnetic Kondo system at ambient pressure, located close to the boundary with non-magnetic systems. It has two ordering temperatures, T = 3.9 K and T = 3.2 K, which are suppressed under pressure. Between 0.7 and 1.4 GPa only a single transition was identified, with T reaching 1.9 K by 1.4 GPa. At 1.9 GPa two transitions could again be seen by AC calorimetry at 2.0 and 1.3 K, accompanied by a qualitative change in the behaviour of the resistivity. The Sommerfeld coefficient showed a maximum of 755 mJ mol K at 1.4 GPa, up from 448 mJ mol K at close to ambient pressure. The residual resistivity was found to decrease sharply above 1.4 GPa after an initial increase with pressure.
AB - We present resistivity and AC calorimetry measurements of single crystalline CeNiGe2 under high pressure and low temperature in a diamond anvil cell. CeNiGe2 is a highly anisotropic, antiferromagnetic Kondo system at ambient pressure, located close to the boundary with non-magnetic systems. It has two ordering temperatures, T = 3.9 K and T = 3.2 K, which are suppressed under pressure. Between 0.7 and 1.4 GPa only a single transition was identified, with T reaching 1.9 K by 1.4 GPa. At 1.9 GPa two transitions could again be seen by AC calorimetry at 2.0 and 1.3 K, accompanied by a qualitative change in the behaviour of the resistivity. The Sommerfeld coefficient showed a maximum of 755 mJ mol K at 1.4 GPa, up from 448 mJ mol K at close to ambient pressure. The residual resistivity was found to decrease sharply above 1.4 GPa after an initial increase with pressure.
UR - http://dx.doi.org/10.1016/j.jmmm.2006.10.032
U2 - 10.1016/j.jmmm.2006.10.032
DO - 10.1016/j.jmmm.2006.10.032
M3 - Article
AN - SCOPUS:33847308234
SN - 0304-8853
VL - 310
SP - 343
EP - 345
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 2 SUPPL. PART 1
ER -