Orbital fluctuations in ground state of YTiO3: 47,49Ti NMR study

Takashi Kiyama; Hajime Saitoh; Masayuki Itoh; Katsuaki Kodama; Hirohiko Ichikawa; Jun Akimitsu

doi:10.1143/JPSJ.74.1123

Orbital fluctuations in ground state of YTiO₃: ^47,49Ti NMR study

Takashi Kiyama, Hajime Saitoh, Masayuki Itoh, Katsuaki Kodama, Hirohiko Ichikawa, Jun Akimitsu

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

^47,49Ti NMR spectra of a single crystal of YTiO₃ have been obtained at 1.5 K in the ferromagnetically ordered state under an external field of 3 T. With rotation of the sample in the magnetic field, the spectra show a characteristic angle dependence which reflects Ti 3d orbital ordering. The observed spectra indicate that the Ti 3d quadrupole moment is markedly reduced from that predicted by the orbital ordering model based on the Hartree-Fock and GGA band calculations. The reduction of the quadrupole moment is considered to originate from quantum fluctuations in the t_2g orbital states, taking into account that the effective spin-orbit interaction and itinerancy are not strong in this compound.

Original language	English
Pages (from-to)	1123-1126
Number of pages	4
Journal	journal of the physical society of japan
Volume	74
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.74.1123
Publication status	Published - Apr 2005
Externally published	Yes

Keywords

NMR
Orbital ordering
Quantum orbital fluctuation
YTiO

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.74.1123

Cite this

@article{2ebbd371b6c1490eabc4f3909cf5df6c,

title = "Orbital fluctuations in ground state of YTiO3: 47,49Ti NMR study",

abstract = "47,49Ti NMR spectra of a single crystal of YTiO3 have been obtained at 1.5 K in the ferromagnetically ordered state under an external field of 3 T. With rotation of the sample in the magnetic field, the spectra show a characteristic angle dependence which reflects Ti 3d orbital ordering. The observed spectra indicate that the Ti 3d quadrupole moment is markedly reduced from that predicted by the orbital ordering model based on the Hartree-Fock and GGA band calculations. The reduction of the quadrupole moment is considered to originate from quantum fluctuations in the t2g orbital states, taking into account that the effective spin-orbit interaction and itinerancy are not strong in this compound.",

keywords = "NMR, Orbital ordering, Quantum orbital fluctuation, YTiO",

author = "Takashi Kiyama and Hajime Saitoh and Masayuki Itoh and Katsuaki Kodama and Hirohiko Ichikawa and Jun Akimitsu",

year = "2005",

month = apr,

doi = "10.1143/JPSJ.74.1123",

language = "English",

volume = "74",

pages = "1123--1126",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "4",

}

TY - JOUR

T1 - Orbital fluctuations in ground state of YTiO3

T2 - 47,49Ti NMR study

AU - Kiyama, Takashi

AU - Saitoh, Hajime

AU - Itoh, Masayuki

AU - Kodama, Katsuaki

AU - Ichikawa, Hirohiko

AU - Akimitsu, Jun

PY - 2005/4

Y1 - 2005/4

N2 - 47,49Ti NMR spectra of a single crystal of YTiO3 have been obtained at 1.5 K in the ferromagnetically ordered state under an external field of 3 T. With rotation of the sample in the magnetic field, the spectra show a characteristic angle dependence which reflects Ti 3d orbital ordering. The observed spectra indicate that the Ti 3d quadrupole moment is markedly reduced from that predicted by the orbital ordering model based on the Hartree-Fock and GGA band calculations. The reduction of the quadrupole moment is considered to originate from quantum fluctuations in the t2g orbital states, taking into account that the effective spin-orbit interaction and itinerancy are not strong in this compound.

AB - 47,49Ti NMR spectra of a single crystal of YTiO3 have been obtained at 1.5 K in the ferromagnetically ordered state under an external field of 3 T. With rotation of the sample in the magnetic field, the spectra show a characteristic angle dependence which reflects Ti 3d orbital ordering. The observed spectra indicate that the Ti 3d quadrupole moment is markedly reduced from that predicted by the orbital ordering model based on the Hartree-Fock and GGA band calculations. The reduction of the quadrupole moment is considered to originate from quantum fluctuations in the t2g orbital states, taking into account that the effective spin-orbit interaction and itinerancy are not strong in this compound.

KW - NMR

KW - Orbital ordering

KW - Quantum orbital fluctuation

KW - YTiO

UR - http://www.scopus.com/inward/record.url?scp=24644506770&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=24644506770&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.74.1123

DO - 10.1143/JPSJ.74.1123

M3 - Article

AN - SCOPUS:24644506770

SN - 0031-9015

VL - 74

SP - 1123

EP - 1126

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 4

ER -