Magnetic excitation in La1.5Ca0.5CoO4

K. Horigane; K. Yamada; H. Hiraka; J. Akimitsu

doi:10.1016/j.jmmm.2006.10.530

Magnetic excitation in La_1.5Ca_0.5CoO₄

K. Horigane, K. Yamada, H. Hiraka, J. Akimitsu

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

6 Citations (Scopus)

Abstract

We examined checkerboard charge and spin order in La_1.5Ca_0.5CoO₄ by elastic and inelastic neutron scattering. We discovered the sharp magnetic peaks with l=half-integer and broad magnetic peaks with l=integer in (0.5, 0, l). The origin of magnetic scattering can be explained by the minority and majority stacking arrangement of Co²⁺/Co³⁺ spins along the c-axis since the same magnetic reflections arise from the two stacking vectors in La_0.5Sr_1.5MnO₄. Spin-wave dispersion at majority stacking is seen up to 16 meV, in contrast to 50 meV in La_1.5Sr_0.5NiO₄. This indicates a much weaker exchange interaction in the cobaltates than in nickelates. The dispersion at majority stacking has almost a same one with that of minority stacking.

Original language	English
Pages (from-to)	774-776
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 1
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.530
Publication status	Published - Mar 1 2007
Externally published	Yes

Keywords

Checkerboard charge order
Cobaltate
Magnetic excitation
Majority and minority stacking

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2006.10.530

Fingerprint Dive into the research topics of 'Magnetic excitation in La1.5Ca0.5CoO4'. Together they form a unique fingerprint.

Cite this

@article{e59dbce8dfdc4bf1a45168c59c005720,

title = "Magnetic excitation in La1.5Ca0.5CoO4",

abstract = "We examined checkerboard charge and spin order in La1.5Ca0.5CoO4 by elastic and inelastic neutron scattering. We discovered the sharp magnetic peaks with l=half-integer and broad magnetic peaks with l=integer in (0.5, 0, l). The origin of magnetic scattering can be explained by the minority and majority stacking arrangement of Co2+/Co3+ spins along the c-axis since the same magnetic reflections arise from the two stacking vectors in La0.5Sr1.5MnO4. Spin-wave dispersion at majority stacking is seen up to 16 meV, in contrast to 50 meV in La1.5Sr0.5NiO4. This indicates a much weaker exchange interaction in the cobaltates than in nickelates. The dispersion at majority stacking has almost a same one with that of minority stacking.",

keywords = "Checkerboard charge order, Cobaltate, Magnetic excitation, Majority and minority stacking",

author = "K. Horigane and K. Yamada and H. Hiraka and J. Akimitsu",

year = "2007",

month = mar,

day = "1",

doi = "10.1016/j.jmmm.2006.10.530",

language = "English",

volume = "310",

pages = "774--776",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "2 SUPPL. PART 1",

}

TY - JOUR

T1 - Magnetic excitation in La1.5Ca0.5CoO4

AU - Horigane, K.

AU - Yamada, K.

AU - Hiraka, H.

AU - Akimitsu, J.

PY - 2007/3/1

Y1 - 2007/3/1

N2 - We examined checkerboard charge and spin order in La1.5Ca0.5CoO4 by elastic and inelastic neutron scattering. We discovered the sharp magnetic peaks with l=half-integer and broad magnetic peaks with l=integer in (0.5, 0, l). The origin of magnetic scattering can be explained by the minority and majority stacking arrangement of Co2+/Co3+ spins along the c-axis since the same magnetic reflections arise from the two stacking vectors in La0.5Sr1.5MnO4. Spin-wave dispersion at majority stacking is seen up to 16 meV, in contrast to 50 meV in La1.5Sr0.5NiO4. This indicates a much weaker exchange interaction in the cobaltates than in nickelates. The dispersion at majority stacking has almost a same one with that of minority stacking.

AB - We examined checkerboard charge and spin order in La1.5Ca0.5CoO4 by elastic and inelastic neutron scattering. We discovered the sharp magnetic peaks with l=half-integer and broad magnetic peaks with l=integer in (0.5, 0, l). The origin of magnetic scattering can be explained by the minority and majority stacking arrangement of Co2+/Co3+ spins along the c-axis since the same magnetic reflections arise from the two stacking vectors in La0.5Sr1.5MnO4. Spin-wave dispersion at majority stacking is seen up to 16 meV, in contrast to 50 meV in La1.5Sr0.5NiO4. This indicates a much weaker exchange interaction in the cobaltates than in nickelates. The dispersion at majority stacking has almost a same one with that of minority stacking.

KW - Checkerboard charge order

KW - Cobaltate

KW - Magnetic excitation

KW - Majority and minority stacking

UR - http://www.scopus.com/inward/record.url?scp=33847251625&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847251625&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2006.10.530

DO - 10.1016/j.jmmm.2006.10.530

M3 - Article

AN - SCOPUS:33847251625

VL - 310

SP - 774

EP - 776

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - 2 SUPPL. PART 1

ER -