High pressure effect on the magnetic transition in heavy fermion systems CePd2Al3 and CePdAl

✍ Scribed by J Tang; A Matsushita; H Kitazawa; T Matsumoto

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 355 KB
• Volume: 217
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(95)00541-2

✦ Synopsis

We have investigated the pressure dependence of the antiferromagnetic transition temperatures TN for CePd2A13 and CePdA1. Although the T N of both compounds are almost equal at ambient pressure, the pressure dependences are different; T N of CePd2A13 initially increases at a rate of 0.3 K/GPa, then passes through a maximum near 0.75 GPa and falls rapidly at higher pressures while T N of CePdA1 is pressure insensitive in the low pressure region and decreases monotonically in the high pressure region. The results are discussed in terms of the competition between the Kondo effect and the RKKY interaction and it is shown that the results can be understood by the phase diagram proposed by Doniach.