Low Temperature Thermal and Magnetic Properties of Cu-Doped Haldane Gap Antiferromagnet NENP

Tatsuo C. Kobayashi; Hajime Honda; Akihiro Koda; Kiichi Amaya

doi:10.1143/JPSJ.64.2609

Low Temperature Thermal and Magnetic Properties of Cu-Doped Haldane Gap Antiferromagnet NENP

Tatsuo C. Kobayashi, Hajime Honda, Akihiro Koda, Kiichi Amaya

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

13 Citations (Scopus)

Abstract

Effects of Cu-impurity are studied by heat capacity and susceptibility measurements down to 30 mK on the Haldane-gap antiferromagnet Ni(C₂H₈N₂)₂NO₂(ClO₄) (NENP). We have observed the characteristic heat capacity and susceptibility which show contributions from free spins of the Cu²⁺-impurities with S=1/2 and the fractional spin S=1/2 states at the ends of the Ni²⁺ (S=1)-chain adjacent to the Cu²⁺-impurities. The present results are explained completely by the phenomenological Hamiltonian for a trimmer of S=1/2 proposed by the ESR study on this system.

Original language	English
Pages (from-to)	2609-2613
Number of pages	5
Journal	journal of the physical society of japan
Volume	64
Issue number	7
DOIs	https://doi.org/10.1143/JPSJ.64.2609
Publication status	Published - Jul 1995
Externally published	Yes

Keywords

Cu-impurity
Haldane gap
NENP
heat capacity
low temperature
susceptibility

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.64.2609

Cite this

@article{b1b542e1d8e7459b9738cb65effbe79d,

title = "Low Temperature Thermal and Magnetic Properties of Cu-Doped Haldane Gap Antiferromagnet NENP",

abstract = "Effects of Cu-impurity are studied by heat capacity and susceptibility measurements down to 30 mK on the Haldane-gap antiferromagnet Ni(C2H8N2)2NO2(ClO4) (NENP). We have observed the characteristic heat capacity and susceptibility which show contributions from free spins of the Cu2+-impurities with S=1/2 and the fractional spin S=1/2 states at the ends of the Ni2+ (S=1)-chain adjacent to the Cu2+-impurities. The present results are explained completely by the phenomenological Hamiltonian for a trimmer of S=1/2 proposed by the ESR study on this system.",

keywords = "Cu-impurity, Haldane gap, NENP, heat capacity, low temperature, susceptibility",

author = "Kobayashi, {Tatsuo C.} and Hajime Honda and Akihiro Koda and Kiichi Amaya",

year = "1995",

month = jul,

doi = "10.1143/JPSJ.64.2609",

language = "English",

volume = "64",

pages = "2609--2613",

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

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "7",

}

TY - JOUR

T1 - Low Temperature Thermal and Magnetic Properties of Cu-Doped Haldane Gap Antiferromagnet NENP

AU - Kobayashi, Tatsuo C.

AU - Honda, Hajime

AU - Koda, Akihiro

AU - Amaya, Kiichi

PY - 1995/7

Y1 - 1995/7

N2 - Effects of Cu-impurity are studied by heat capacity and susceptibility measurements down to 30 mK on the Haldane-gap antiferromagnet Ni(C2H8N2)2NO2(ClO4) (NENP). We have observed the characteristic heat capacity and susceptibility which show contributions from free spins of the Cu2+-impurities with S=1/2 and the fractional spin S=1/2 states at the ends of the Ni2+ (S=1)-chain adjacent to the Cu2+-impurities. The present results are explained completely by the phenomenological Hamiltonian for a trimmer of S=1/2 proposed by the ESR study on this system.

AB - Effects of Cu-impurity are studied by heat capacity and susceptibility measurements down to 30 mK on the Haldane-gap antiferromagnet Ni(C2H8N2)2NO2(ClO4) (NENP). We have observed the characteristic heat capacity and susceptibility which show contributions from free spins of the Cu2+-impurities with S=1/2 and the fractional spin S=1/2 states at the ends of the Ni2+ (S=1)-chain adjacent to the Cu2+-impurities. The present results are explained completely by the phenomenological Hamiltonian for a trimmer of S=1/2 proposed by the ESR study on this system.

KW - Cu-impurity

KW - Haldane gap

KW - NENP

KW - heat capacity

KW - low temperature

KW - susceptibility

UR - http://www.scopus.com/inward/record.url?scp=21844499776&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=21844499776&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.64.2609

DO - 10.1143/JPSJ.64.2609

M3 - Article

AN - SCOPUS:21844499776

SN - 0031-9015

VL - 64

SP - 2609

EP - 2613

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 7

ER -

Low Temperature Thermal and Magnetic Properties of Cu-Doped Haldane Gap Antiferromagnet NENP

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this