Abstract
We have performed the specific heat study in a new geometrically frustrated system, clinoatacamite Cu2Cl(OH)3 with the corner-sharing tetrahedron structure of the Cu2+ ions with S=1/2 Heisenberg spin. At H=0 T, two anomalies are observed at T1=18.1 K and at T 2=6.2 K. The specific heat decreases rapidly below T2 and shows no anomaly down to T=150 mK despite the existence of the spin fluctuation shown in the μSR experiments. As the magnetic field is increased, the sharp peak at T2 is broadened and shows a small reentrant behavior in the T - H phase diagram. On the other hand, the peak at T1 shows no obvious change up to H=5 T. The entropy at T1 is estimated as ∼0.35Rln2 at H=0 T. These features may be caused by the two dimensional nature of the kagome antiferromagnets which are weakly coupled via Cu 2+ ions at the triangular sites located in between the kagome layers.
| Original language | English |
|---|---|
| Article number | 032047 |
| Journal | Journal of Physics: Conference Series |
| Volume | 200 |
| Issue number | SECTION 3 |
| DOIs | |
| Publication status | Published - Jan 1 2010 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Cite this
Specific heat study of geometrically frustrated magnet clinoatacamite Cu2Cl(OH)3 . / Morodomi, Hiroki; Ienaga, Koichiro; Inagaki, Yuji; Kawae, Tatsuya; Hagiwara, Masayuki; Zheng, X. G.
In: Journal of Physics: Conference Series, Vol. 200, No. SECTION 3, 032047, 01.01.2010.Research output: Contribution to journal › Conference article
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TY - JOUR
T1 - Specific heat study of geometrically frustrated magnet clinoatacamite Cu2Cl(OH)3
AU - Morodomi, Hiroki
AU - Ienaga, Koichiro
AU - Inagaki, Yuji
AU - Kawae, Tatsuya
AU - Hagiwara, Masayuki
AU - Zheng, X. G.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - We have performed the specific heat study in a new geometrically frustrated system, clinoatacamite Cu2Cl(OH)3 with the corner-sharing tetrahedron structure of the Cu2+ ions with S=1/2 Heisenberg spin. At H=0 T, two anomalies are observed at T1=18.1 K and at T 2=6.2 K. The specific heat decreases rapidly below T2 and shows no anomaly down to T=150 mK despite the existence of the spin fluctuation shown in the μSR experiments. As the magnetic field is increased, the sharp peak at T2 is broadened and shows a small reentrant behavior in the T - H phase diagram. On the other hand, the peak at T1 shows no obvious change up to H=5 T. The entropy at T1 is estimated as ∼0.35Rln2 at H=0 T. These features may be caused by the two dimensional nature of the kagome antiferromagnets which are weakly coupled via Cu 2+ ions at the triangular sites located in between the kagome layers.
AB - We have performed the specific heat study in a new geometrically frustrated system, clinoatacamite Cu2Cl(OH)3 with the corner-sharing tetrahedron structure of the Cu2+ ions with S=1/2 Heisenberg spin. At H=0 T, two anomalies are observed at T1=18.1 K and at T 2=6.2 K. The specific heat decreases rapidly below T2 and shows no anomaly down to T=150 mK despite the existence of the spin fluctuation shown in the μSR experiments. As the magnetic field is increased, the sharp peak at T2 is broadened and shows a small reentrant behavior in the T - H phase diagram. On the other hand, the peak at T1 shows no obvious change up to H=5 T. The entropy at T1 is estimated as ∼0.35Rln2 at H=0 T. These features may be caused by the two dimensional nature of the kagome antiferromagnets which are weakly coupled via Cu 2+ ions at the triangular sites located in between the kagome layers.
UR - http://www.scopus.com/inward/record.url?scp=77957126446&partnerID=8YFLogxK
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U2 - 10.1088/1742-6596/200/3/032047
DO - 10.1088/1742-6596/200/3/032047
M3 - Conference article
AN - SCOPUS:77957126446
VL - 200
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - SECTION 3
M1 - 032047
ER -