Single-crystal ac susceptibility measurements on [Co(NH<inf>3</inf>) <inf>6</inf>][CuCl<inf>5</inf>], a 3D, S=1/2 Heisenberg antiferromagnet

Mary C. Moròn; Fernando Palacio; Josefina Pons; Jaime Casabo; K. E. Merabet; Richard L. Carlin

doi:10.1063/1.340720

Single-crystal ac susceptibility measurements on [Co(NH<inf>3</inf>) <inf>6</inf>][CuCl<inf>5</inf>], a 3D, S=1/2 Heisenberg antiferromagnet

Mary C. Moròn, Fernando Palacio, Josefina Pons, Jaime Casabo, K. E. Merabet, Richard L. Carlin

Department of Chemistry

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

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Abstract

Single-crystal ac magnetic susceptibilities of [Co(NH3) 6][CuCl5] along the three crystallographic axes in the temperature range from 1.1 to 90 K are presented. The magnetic behavior is characteristic of a three-dimensional antiferromagnet, its ordering temperature being at Tc=3.8 K. Susceptibilty data can be fit to a Heisenberg S=1/2 simple cubic model using high-temperature series expansions extrapolated with Pade approximants. Good agreement is found for an exchange constant J/kB=-3.13 K and values of g factor ga=2.09, g b=gc =2.04, a,b, and c being the crystallographic axes. This result makes [Co(NH3)6][CuCl5] one of the few examples of a 3D antiferromagnetic Heisenberg S=1/2 model. The magnetic behavior below Tc indicates the existence of crystallographic domains due to the structural transition from cubic to tetragonal symmetry that the system has at about 280 K.

Original language	English
Pages (from-to)	3566-3568
Journal	Journal of Applied Physics
Volume	63
Issue number	8
DOIs	https://doi.org/10.1063/1.340720
Publication status	Published - 1 Dec 1988

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title = "Single-crystal ac susceptibility measurements on [Co(NH3) 6][CuCl5], a 3D, S=1/2 Heisenberg antiferromagnet",

abstract = "Single-crystal ac magnetic susceptibilities of [Co(NH3) 6][CuCl5] along the three crystallographic axes in the temperature range from 1.1 to 90 K are presented. The magnetic behavior is characteristic of a three-dimensional antiferromagnet, its ordering temperature being at Tc=3.8 K. Susceptibilty data can be fit to a Heisenberg S=1/2 simple cubic model using high-temperature series expansions extrapolated with Pade approximants. Good agreement is found for an exchange constant J/kB=-3.13 K and values of g factor ga=2.09, g b=gc =2.04, a,b, and c being the crystallographic axes. This result makes [Co(NH3)6][CuCl5] one of the few examples of a 3D antiferromagnetic Heisenberg S=1/2 model. The magnetic behavior below Tc indicates the existence of crystallographic domains due to the structural transition from cubic to tetragonal symmetry that the system has at about 280 K.",

author = "Mor{\`o}n, {Mary C.} and Fernando Palacio and Josefina Pons and Jaime Casabo and Merabet, {K. E.} and Carlin, {Richard L.}",

year = "1988",

month = dec,

day = "1",

doi = "10.1063/1.340720",

language = "English",

volume = "63",

pages = "3566--3568",

journal = "Journal of Applied Physics",

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TY - JOUR

T1 - Single-crystal ac susceptibility measurements on [Co(NH3) 6][CuCl5], a 3D, S=1/2 Heisenberg antiferromagnet

AU - Moròn, Mary C.

AU - Palacio, Fernando

AU - Pons, Josefina

AU - Casabo, Jaime

AU - Merabet, K. E.

AU - Carlin, Richard L.

PY - 1988/12/1

Y1 - 1988/12/1

N2 - Single-crystal ac magnetic susceptibilities of [Co(NH3) 6][CuCl5] along the three crystallographic axes in the temperature range from 1.1 to 90 K are presented. The magnetic behavior is characteristic of a three-dimensional antiferromagnet, its ordering temperature being at Tc=3.8 K. Susceptibilty data can be fit to a Heisenberg S=1/2 simple cubic model using high-temperature series expansions extrapolated with Pade approximants. Good agreement is found for an exchange constant J/kB=-3.13 K and values of g factor ga=2.09, g b=gc =2.04, a,b, and c being the crystallographic axes. This result makes [Co(NH3)6][CuCl5] one of the few examples of a 3D antiferromagnetic Heisenberg S=1/2 model. The magnetic behavior below Tc indicates the existence of crystallographic domains due to the structural transition from cubic to tetragonal symmetry that the system has at about 280 K.

AB - Single-crystal ac magnetic susceptibilities of [Co(NH3) 6][CuCl5] along the three crystallographic axes in the temperature range from 1.1 to 90 K are presented. The magnetic behavior is characteristic of a three-dimensional antiferromagnet, its ordering temperature being at Tc=3.8 K. Susceptibilty data can be fit to a Heisenberg S=1/2 simple cubic model using high-temperature series expansions extrapolated with Pade approximants. Good agreement is found for an exchange constant J/kB=-3.13 K and values of g factor ga=2.09, g b=gc =2.04, a,b, and c being the crystallographic axes. This result makes [Co(NH3)6][CuCl5] one of the few examples of a 3D antiferromagnetic Heisenberg S=1/2 model. The magnetic behavior below Tc indicates the existence of crystallographic domains due to the structural transition from cubic to tetragonal symmetry that the system has at about 280 K.

U2 - 10.1063/1.340720

DO - 10.1063/1.340720

M3 - Article

SN - 0021-8979

VL - 63

SP - 3566

EP - 3568

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 8

ER -

Single-crystal ac susceptibility measurements on [Co(NH<inf>3</inf>) <inf>6</inf>][CuCl<inf>5</inf>], a 3D, S=1/2 Heisenberg antiferromagnet

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