Successive magnetic phase transitions of a Co vermiculite intercalation compound: An Ising-like Heisenberg antiferromagnet on a triangular lattice

Itsuko S. Suzuki; Masatsugu Suzuki; N. Wada

Successive magnetic phase transitions of a Co vermiculite intercalation compound: An Ising-like Heisenberg antiferromagnet on a triangular lattice

Itsuko S. Suzuki
, Masatsugu Suzuki
, N. Wada

Physics

Binghamton University

State University of New York Binghamton University
Toyo University

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

2 Scopus citations

Abstract

A Co vermiculite intercalation compound (VIC) magnetically behaves as an Ising-like Heisenberg antiferromagnet on a triangular lattice. Magnetic properties of a Co VIC have been studied using superconducting quantum interference device (SQUID) dc magnetization and SQUID ac magnetic-susceptibility measurements. This compound undergoes magnetic phase transitions at T_N1 (=16.3 K) and TN₂ (=10.7 K), and shows magnetic anomalies at T_p1 (=7.7 K), T_p2 (=5.9 K), and T_p3 (≈3K). The c-axis spin order and the in-plane spin order occur at T_N1 and T_N2, respectively. The magnetic phase diagram for H∥c consists of four phases whose boundaries meet at a multicritical point (T_m ≈12 K,H_m ≈25 kOe). The freedom of rotation around an axis perpendicular to the spin plane where three sublattice- magnetization vectors lie could be frozen out below T_p1 or T_p2. A superparamagnetic behavior of Arrhenius type is observed around T_p3.

Original language	English
Article number	134438
Pages (from-to)	1344381-1344389
Number of pages	9
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	65
Issue number	13
State	Published - Apr 1 2002

Cite this

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title = "Successive magnetic phase transitions of a Co vermiculite intercalation compound: An Ising-like Heisenberg antiferromagnet on a triangular lattice",

abstract = "A Co vermiculite intercalation compound (VIC) magnetically behaves as an Ising-like Heisenberg antiferromagnet on a triangular lattice. Magnetic properties of a Co VIC have been studied using superconducting quantum interference device (SQUID) dc magnetization and SQUID ac magnetic-susceptibility measurements. This compound undergoes magnetic phase transitions at TN1 (=16.3 K) and TN2 (=10.7 K), and shows magnetic anomalies at Tp1 (=7.7 K), Tp2 (=5.9 K), and Tp3 (≈3K). The c-axis spin order and the in-plane spin order occur at TN1 and TN2, respectively. The magnetic phase diagram for H∥c consists of four phases whose boundaries meet at a multicritical point (Tm ≈12 K,Hm ≈25 kOe). The freedom of rotation around an axis perpendicular to the spin plane where three sublattice- magnetization vectors lie could be frozen out below Tp1 or Tp2. A superparamagnetic behavior of Arrhenius type is observed around Tp3.",

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Successive magnetic phase transitions of a Co vermiculite intercalation compound: An Ising-like Heisenberg antiferromagnet on a triangular lattice. / Suzuki, Itsuko S.; Suzuki, Masatsugu; Wada, N.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 13, 134438, 01.04.2002, p. 1344381-1344389.

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

TY - JOUR

T1 - Successive magnetic phase transitions of a Co vermiculite intercalation compound

T2 - An Ising-like Heisenberg antiferromagnet on a triangular lattice

AU - Suzuki, Itsuko S.

AU - Suzuki, Masatsugu

AU - Wada, N.

PY - 2002/4/1

Y1 - 2002/4/1

N2 - A Co vermiculite intercalation compound (VIC) magnetically behaves as an Ising-like Heisenberg antiferromagnet on a triangular lattice. Magnetic properties of a Co VIC have been studied using superconducting quantum interference device (SQUID) dc magnetization and SQUID ac magnetic-susceptibility measurements. This compound undergoes magnetic phase transitions at TN1 (=16.3 K) and TN2 (=10.7 K), and shows magnetic anomalies at Tp1 (=7.7 K), Tp2 (=5.9 K), and Tp3 (≈3K). The c-axis spin order and the in-plane spin order occur at TN1 and TN2, respectively. The magnetic phase diagram for H∥c consists of four phases whose boundaries meet at a multicritical point (Tm ≈12 K,Hm ≈25 kOe). The freedom of rotation around an axis perpendicular to the spin plane where three sublattice- magnetization vectors lie could be frozen out below Tp1 or Tp2. A superparamagnetic behavior of Arrhenius type is observed around Tp3.

AB - A Co vermiculite intercalation compound (VIC) magnetically behaves as an Ising-like Heisenberg antiferromagnet on a triangular lattice. Magnetic properties of a Co VIC have been studied using superconducting quantum interference device (SQUID) dc magnetization and SQUID ac magnetic-susceptibility measurements. This compound undergoes magnetic phase transitions at TN1 (=16.3 K) and TN2 (=10.7 K), and shows magnetic anomalies at Tp1 (=7.7 K), Tp2 (=5.9 K), and Tp3 (≈3K). The c-axis spin order and the in-plane spin order occur at TN1 and TN2, respectively. The magnetic phase diagram for H∥c consists of four phases whose boundaries meet at a multicritical point (Tm ≈12 K,Hm ≈25 kOe). The freedom of rotation around an axis perpendicular to the spin plane where three sublattice- magnetization vectors lie could be frozen out below Tp1 or Tp2. A superparamagnetic behavior of Arrhenius type is observed around Tp3.

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VL - 65

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EP - 1344389

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 13

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ER -

Successive magnetic phase transitions of a Co vermiculite intercalation compound: An Ising-like Heisenberg antiferromagnet on a triangular lattice

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