Modification of magnetic fluctuations by interfacial interactions in artificially engineered heavy-fermion superlattices

التفاصيل البيبلوغرافية
العنوان: Modification of magnetic fluctuations by interfacial interactions in artificially engineered heavy-fermion superlattices
المؤلفون: Nakamine, Genki, Yamanaka, Takayoshi, Kitagawa, Shunsaku, Naritsuka, Masahiro, Ishii, Tomohiro, Shibauchi, Takasada, Terashima, Takahito, Kasahara, Yuichi, Matsuda, Yuji, Ishida, Kenji
المصدر: Phys. Rev. B 99, 081115 (2019)
سنة النشر: 2018
المجموعة: Condensed Matter
مصطلحات موضوعية: Condensed Matter - Strongly Correlated Electrons
الوصف: Recent progress in the fabrication techniques of superlattices (SLs) has made it possible to sandwich several-layer-thick block layers (BLs) of heavy-fermion superconductor CeCoIn5 between conventional-metal YbCoIn5 BLs or spin-density-wave-metal CeRhIn5 BLs of a similar thickness. However, the magnetic state in each BL, particularly at the interface, is not yet understood, as experimental techniques applicable to the SL system are limited. Here, we report measurements of 59Co nuclear magnetic resonance, which is a microscopic probe of the magnetic properties inside the target BLs. In the CeCoIn5/YbCoIn5 SL, the low-temperature magnetic fluctuations of the CeCoIn5 BL are weakened as expected from the Rashba spin-orbit effect. However, in the CeCoIn5/CeRhIn5 SL, the fluctuations show an anomalous enhancement below 6 K, highlighting the importance of the magnetic proximity effect occurring near a magnetic-ordering temperature TN ~ 3 K of the CeRhIn5 BL. We suggest that the magnetic properties of the BLs can be altered by the interfacial interaction, which is an alternative route to modify the magnetic properties.
Comment: 5 pages, 4 figures
نوع الوثيقة: Working Paper
DOI: 10.1103/PhysRevB.99.081115
URL الوصول: http://arxiv.org/abs/1803.10382
رقم الأكسشن: edsarx.1803.10382
قاعدة البيانات: arXiv
الوصف
DOI:10.1103/PhysRevB.99.081115