High field magnetism of the spinel oxide CoAl 2O 4

M. Hagiwara, S. Kimura, N. Nishihagi, T. Suzuki, Minoru Nohara, H. Takagi, K. Kindo

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We report the results of magnetization and electron spin resonance (ESR) measurements on sintered samples of the spinel oxide CoAl 2O 4 in magnetic fields up to 53 T. In CoAl 2O 4, Co 2+ (S=3/2) ions make a diamond lattice, indicating naively that no geometrical frustration takes place. This spinel oxide, however, is thought to be in the vicinity of a quantum melting point of the antiferromagnetically ordered state because of no sharp peak in the temperature dependence of specific heat. Magnetization curve at 4.2 K is almost linear in magnetic fields and a broad ESR signal was observed on a straight resonance line with g=2.26, implying an antiferromagnetic long range order or a well developed antiferromagnetic short range order with very small anisotropy.

Original languageEnglish
Pages (from-to)11-14
Number of pages4
JournalJournal of Low Temperature Physics
Volume159
Issue number1-2
DOIs
Publication statusPublished - Apr 2010

Fingerprint

Coal
Magnetism
coal
Oxides
spinel
Paramagnetic resonance
Magnetization
electron paramagnetic resonance
Magnetic fields
magnetization
Diamond
oxides
frustration
resonance lines
magnetic fields
Specific heat
melting points
Melting point
Diamonds
Anisotropy

Keywords

  • ESR
  • Geometrical frustration
  • High field magnetism
  • Magnetization
  • Spinel oxides

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)

Cite this

Hagiwara, M., Kimura, S., Nishihagi, N., Suzuki, T., Nohara, M., Takagi, H., & Kindo, K. (2010). High field magnetism of the spinel oxide CoAl 2O 4 . Journal of Low Temperature Physics, 159(1-2), 11-14. https://doi.org/10.1007/s10909-009-0081-y

High field magnetism of the spinel oxide CoAl 2O 4 . / Hagiwara, M.; Kimura, S.; Nishihagi, N.; Suzuki, T.; Nohara, Minoru; Takagi, H.; Kindo, K.

In: Journal of Low Temperature Physics, Vol. 159, No. 1-2, 04.2010, p. 11-14.

Research output: Contribution to journalArticle

Hagiwara, M, Kimura, S, Nishihagi, N, Suzuki, T, Nohara, M, Takagi, H & Kindo, K 2010, 'High field magnetism of the spinel oxide CoAl 2O 4 ', Journal of Low Temperature Physics, vol. 159, no. 1-2, pp. 11-14. https://doi.org/10.1007/s10909-009-0081-y
Hagiwara, M. ; Kimura, S. ; Nishihagi, N. ; Suzuki, T. ; Nohara, Minoru ; Takagi, H. ; Kindo, K. / High field magnetism of the spinel oxide CoAl 2O 4 . In: Journal of Low Temperature Physics. 2010 ; Vol. 159, No. 1-2. pp. 11-14.
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