Collinear spin density wave order and anisotropic spin fluctuations in the frustrated J1-J2 chain magnet NaCuMoO 4 (OH)

Kazuhiro Nawa, Makoto Yoshida, Masashi Takigawa, Yoshihiko Okamoto, Zenji Hiroi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The phase diagram of the quasi-one-dimensional magnet NaCuMoO4(OH) is established through single-crystal NMR and heat-capacity measurements. The Na23 and H1 NMR experiments indicate a spiral and a collinear spin density wave (SDW) order below and above Bc = 1.5-1.8 T, respectively. Moreover, in the paramagnetic state above the SDW transition temperature, the nuclear spin-lattice relaxation rate 1/T1 indicates anisotropic spin fluctuations that have gapped excitations in the transverse spectrum but gapless ones in the longitudinal spectrum. These static and dynamic properties are well described by a theoretical model assuming quasi-one-dimensional chains with competing ferromagnetic nearest-neighbor interactions J1 and antiferromagnetic next-nearest-neighbor interactions J2 (J1-J2 chains). Because of the excellent crystal quality and good one-dimensionality, NaCuMoO4(OH) is a promising compound to elucidate the unique physics of the frustrated J1-J2 chain.

Original languageEnglish
Article number174433
JournalPhysical Review B
Volume96
Issue number17
DOIs
Publication statusPublished - 2017 Nov 22

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Collinear spin density wave order and anisotropic spin fluctuations in the frustrated J1-J2 chain magnet NaCuMoO <sub>4</sub> (OH)'. Together they form a unique fingerprint.

Cite this