Magnetic, thermal, and optical properties of single-crystalline CoTa2O6 and FeTa2O6 and their anisotropic magnetocaloric effect

被引：11

作者：

Christian, A. B. ^{[1
]}

Schye, A. T. ^{[1
]}

White, K. O. ^{[1
]}

Neumeier, J. J. ^{[1
]}

机构：

[1] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2018年 / 30卷 / 19期

关键词：

low-dimensional antiferromagnetism; anisotropic magnetocaloric effect; thermal expansion; optical dichroism; heat capacity; TAPIOLITE FETA2O6; NEEL TEMPERATURE; ANTIFERROMAGNET; FIELD; BEHAVIOR; NITA2O6; CHAINS;

D O I：

10.1088/1361-648X/aab884

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetic, thermal, and optical properties of single-crystalline CoTa2O6 and FeTa2O6 are reported. Optical dichroism was observed in CoTa2O6. Magnetic susceptibility chi(T) measurements reveal long-range antiferromagnetic order with Neel temperatures T-N = 6.12(5) K and 8.11(5) K, respectively, and anisotropy in chi. The thermal expansion coefficients exhibit significant anisotropy and the influence of the magnetic ions and long-range order. A structural phase transition to orthorhombic occurs below T-N for FeTa2O6. Magnetic field H lowers TN with its affect largest when H is directed along either [1 1 0] or [1 (1) over bar 0], and smallest when directed along [0 0 1]. This leads to an anisotropic magnetocaloric effect that is investigated through measurements of the specific heat and magnetization in applied magnetic field.

引用

页数：9

共 41 条

[1]

[Anonymous], 2010, ELECT STRUCTURE PROP

[2]

Ashcroft N W., 2003, Solid State Physics

[3] VARIATION OF THE NEEL TEMPERATURE OF THE ONE-DIMENSIONAL ANTIFERROMAGNET K2FEF5 WITH APPLIED FIELD [J].

BOERSMA, F ;

COOPER, DM ;

DEJONGE, WJM ;

DICKSON, DPE ;

JOHNSON, CE ;

TINUS, AMC .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1982, 15 (19) :4141-4145

[4]

Carlin R.L., 1986, Magnetochemistry

[5] Local and long-range order and the influence of applied magnetic field on single-crystalline NiSb2O6 [J].

Christian, A. B. ;

Hunt, C. D. ;

Neumeier, J. J. .

PHYSICAL REVIEW B, 2017, 96 (02)

[6] Local and long-range magnetic order of the spin-3/2 system CoSb2O6 [J].

Christian, A. B. ;

Rebello, A. ;

Smith, M. G. ;

Neumeier, J. J. .

PHYSICAL REVIEW B, 2015, 92 (17)

[7] Magnetic field influence on the Neel, dimer, and spin-liquid states of the low-dimensional antiferromagnets NiTa2O6 and CoSb2O6 [J].

Christian, A. B. ;

Masunaga, S. H. ;

Schye, A. T. ;

Rebello, A. ;

Neumeier, J. J. ;

Yu, Yi-Kuo .

PHYSICAL REVIEW B, 2014, 90 (22)

[8]

Christian A. B., 2017, THESIS

[9] Magnetic properties of tapiolite (FeTa206);: a quasi two-dimensional (2D) antiferromagnet [J].

Chung, EML ;

Lees, MR ;

McIntyre, GJ ;

Wilkinson, C ;

Balakrishnan, G ;

Hague, JP ;

Visser, D ;

Paul, DM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (43) :7837-7852

[10] NEW THEORY OF THE SPIN-PEIERLS TRANSITION WITH SPECIAL RELEVANCE TO THE EXPERIMENTS ON TTFCUBDT [J].

CROSS, MC ;

FISHER, DS .

PHYSICAL REVIEW B, 1979, 19 (01) :402-419

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