巨磁电阻材料A0.05Co0.95Cr2S4(A=Zn、Ni、Cd、Fe)的输运行为及磁性能研究

doi:10.15541/jim20150563

无机材料学报 ›› 2016, Vol. 31 ›› Issue (7): 699-704.DOI: 10.15541/jim20150563

巨磁电阻材料A_0.05Co_0.95Cr₂S₄(A=Zn、Ni、Cd、Fe)的输运行为及磁性能研究

卢晓羽¹, 贾楠¹, 方必军¹, 杨昭荣², 张裕恒²

(1. 常州大学材料科学与工程学院, 江苏省光伏科学与工程协同创新中心, 常州 213164; 2. 中国科学院固体物理研究所, 材料物理重点实验室, 合肥 230031)

收稿日期:2015-11-13 修回日期:2016-03-02 出版日期:2016-07-20 网络出版日期:2016-06-22
作者简介:卢晓羽(1992–), 女, 硕士研究生. E-mail: 1483326817@qq.com
基金资助:
国家自然科学基金(11074258, 51577015);江苏省高校自然科学研究重大项目(15KJA43002);江苏高校优势学科建设工程资助项目

Transport Behavior and Magnetism of Colossal Magnetoresistance Materials A_0.05Co_0.95Cr₂S₄ (A=Zn, Ni, Cd, Fe)

LU Xiao-Yu¹, JIA Nan¹, FANG Bi-Jun¹, YANG Zhao-Rong², ZHANG Yu-Heng²

(1. School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, China; 2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China)

Received:2015-11-13 Revised:2016-03-02 Published:2016-07-20 Online:2016-06-22
About author:LU Xiao-Yu. E-mail: 1483326817@qq.com
Supported by:
National Natural Science Foundation of China (11074258, 51577015);Major Projects of Natural Science Research in Jiangsu Province (15KJA43002);Priority Academic Program Development of Jiangsu Higher Education Institutions

摘要/Abstract

摘要：

过渡金属尖晶石型硫化物具有包括超巨磁电阻(CMR)效应在内的多种物理性能, 其CMR效应机理的研究对开发巨磁电阻材料有重要价值。目前, 铬基硫族尖晶石的CMR效应尚未深入研究。本论文通过固相反应法制备A_0.05Co_0.95Cr₂S₄(A=Zn、Ni、Cd、Fe)样品, 研究磁性和非磁性元素掺杂对CoCr₂S₄晶体结构和磁性能的影响。XRD检测表明, 掺杂的A_0.05Co_0.95Cr₂S₄(A=Zn、Ni、Cd、Fe)均呈现纯的尖晶石结构, 掺杂导致的晶胞参数变化与掺杂元素的离子半径成比例。磁电阻测定表明A_0.05Co_0.95Cr₂S₄(A=Zn、Ni、Fe)均具有巨磁电阻效应。掺杂削弱了铁磁相互作用, 导致A_0.05Co_0.95Cr₂S₄(A=Zn、Ni、Cd、Fe)的居里温度T_C降低。在0.01 T下, A_0.05Co_0.95Cr₂S₄(A=Zn、Ni、Cd、Fe)的零场冷却(ZFC)和加场冷却(FC)曲线均呈现磁性不可逆现象。A_0.05Co_0.95Cr₂S₄(A=Zn、Ni、Cd、Fe)呈现典型的亚铁磁性磁滞回线, 其中Zn_0.05Co_0.95Cr₂S₄的矫顽场最大。

关键词: A0.05Co0.95Cr2S4, 巨磁电阻效应, 零场冷却(ZFC), 加场冷却(FC), 矫顽场

Abstract:

Spinel-type transition metal sulfides possess various super physical properties including colossal magnetoresistance (CMR). The research of the mechanism of the CMR effect is of great value for the development of the CMR sulfide materials, whereas the CMR effect of the spinel chrome-based sulfides is unclear up till now. The A_0.05Co_0.95Cr₂S₄ (A=Zn, Ni, Cd, Fe) samples were prepared by solid-state reaction method. Their effects of magnetic and non-magnetic metal elements on crystal structure and magnetic properties of CoCr₂S₄ after doping were studied. XRD measurement shows that the doped A_0.05Co_0.95Cr₂S₄ (A=Zn, Ni, Cd, Fe) samples exhibit pure spinel structure, in which their crystal cell parameters increase proportional to the ionic radius of the doping elements. Magnetoresistance measurement shows that all the samples exhibit giant magnetoresistance effect. Doping weakens the ferromagnetic interaction, which leads to the decrease of T_C of A_0.05Co_0.95Cr₂S₄ (A=Zn, Ni, Cd, Fe). In the low field of 0.01 T, the curves of the zero-field cooling (ZFC) and field cooling (FC) exhibit magnetic irreversible phenomena. All the samples exhibit typical ferrimagnetic hysteresis loops, among which Zn_0.05Co_0.95Cr₂S₄ shows the largest value of coercivity.

Key words: A0.05Co0.95Cr2S4, colossal magnetoresistance, ZFC, FC, coercive field

中图分类号:

O482

卢晓羽, 贾楠, 方必军, 杨昭荣, 张裕恒. 巨磁电阻材料A_0.05Co_0.95Cr₂S₄(A=Zn、Ni、Cd、Fe)的输运行为及磁性能研究[J]. 无机材料学报, 2016, 31(7): 699-704.

LU Xiao-Yu, JIA Nan, FANG Bi-Jun, YANG Zhao-Rong, ZHANG Yu-Heng. Transport Behavior and Magnetism of Colossal Magnetoresistance Materials A_0.05Co_0.95Cr₂S₄ (A=Zn, Ni, Cd, Fe)[J]. Journal of Inorganic Materials, 2016, 31(7): 699-704.

图/表 7

图1 A0.05Co0.95Cr2S4(A=Zn、Ni、Cd、Fe)的XRD图谱

Fig. 1 XRD patterns of A0.05Co0.95Cr2S4 (A=Zn、Ni、Cd、Fe)

表1 掺杂离子半径和A0.05Co0.95Cr2S4(A=Zn、Fe、Ni、Cd)的晶胞参数

Table 1 Ionic radius of doping elements and unit cell parameter of A0.05Co0.95Cr2S4 (A=Zn、Fe、Ni、Cd)

Doping element	Fe	Zn	Ni	Cd
Ionic radius/nm	0.063	0.060	0.055	0.078
Cell parameter, a/nm	0.99325	0.99317	0.99253	0.99402

图2 A0.05Co0.95Cr2S4(A=Fe、Zn、Ni)在零场和4.5 T外场下的电阻率、磁电阻随温度的变化关系及零场下的lnρ-1000/T关系(插图)

Fig. 2 Temperature dependence of resistivity and magnetoresistance measured at zero field and 4.5 T and the relationships of lnρ-1000/T under zero field (insets)(a) Fe0.05Co0.95Cr2S4; (b) Zn0.05Co0.95Cr2S4; (c) Ni0.05Co0.95Cr2S4

表2 A0.05Co0.95Cr2S4(A=Zn、Fe、Ni、Cd)的磁电阻参数

Table 2 The magnetoresistance parameters of A0.05Co0.95Cr2S4(A=Zn、Fe、Ni、Cd)

Doping element	Fe	Zn	Ni	Cd
MR_4.5T	0.0290	0.1800	0.0035	—
E_H/meV	37	126	308	—
E_L/meV	18	45	119	—
T_C/K	218	215	218	213
H_C/T	0.01972	0.03712	0.01546	0.01998

图3 零场下Cd0.05Co0.95Cr2S4的电阻率随温度的变化曲线

Fig. 3 The curve of resistivity change with temperature of Cd0.05Co0.95Cr2S4 under zero field

图4 外加0.01 T磁场下A0.05Co0.95Cr2S4(A=Fe、Zn、Ni、Cd)零场冷却(ZFC)和加场冷却(FC)的磁化强度与温度的关系

Fig. 4 The relationships of ZFC and FC magnetization versus temperature measured at H=0.01 T of A0.05Co0.95Cr2S4 (A=Fe、Zn、Ni、Cd)(a) Cd0.05Co0.95Cr2S4 and Fe0.05Co0.95Cr2S4; (b) Zn0.05Co0.95Cr2S4 and Ni0.05Co0.95Cr2S4

图5 5 K下测量的A0.05Co0.95Cr2S4(A=Fe、Zn、Ni、Cd)的磁滞回线

Fig. 5 Magnetic hysteresis loops of A0.05Co0.95Cr2S4 (A=Fe、Zn、Ni、Cd) measured at 5 K(a) Fe0.05Co0.95Cr2S4; (b) Zn0.05Co0.95Cr2S4; (c) Ni0.05Co0.95Cr2S4; (d) Cd0.05Co0.95Cr2S4

参考文献 20

[1]	HELMOLT R V, WECKER J, HOLZAPFEL B, et al.Giant negative magnetoresistance in perovskitelike La2/3Ba1/3MnOx ferromagnetic films.J. Phys. Rev. Lett., 1993, 71(14): 2331-2333.
[2]	JIN S, TIEFEL T H, MCCORMACK M, et al.Thousandfold change in resistivity in magnetoresistive La-Ca-Mn-O films.Science, 1994, 264(5157): 413-415.
[3]	BRICEŇO G, CHANG H, SUN X D, et al. A class of cobalt oxide magnetoresistance materials discovered with combinatorial synthesis.Science, 1995, 270(5234): 273-275.
[4]	SHIMAKAWA Y, KUBO Y, MANAKO T.Giant magnetoresistance in Ti2Mn2O7 with the pyrochlore structure.Nature, 1996, 379: 53-55.
[5]	RAMIREZ P, CAVA R J, KRAJEWSKI J.Colossal magnetoresistance in Cr-based chalcogenide spinels.Nature, 1997, 386: 156-159.
[6]	VAQUEIRO P, SOMMER S, POWELL A V.Phase behaviour, magnetic and electronic properties in the series Co1-xNixCr2S4 (0≤x<1).J. Mater. Chem., 2000, 10(10): 2381-2387.
[7]	WANG S, SUN Y, SONG W, et al.The magnetism of Zn-doped colossal magnetoresistance materials Fe1-xZnxCr2S4 (0<x<1).J. Magn. Magn. Mater., 2001, 223(3): 238-246.
[8]	SUN C P, HUANG C L, LIN C C, et al. Colossal electroresistance and colossal magnetoresistance in spinel multiferroic CdCr2S4. Appl. Phys. Lett., 2010, 96(12): 122109-1-3.
[9]	HEMBERGER J, LUNKENHEIMER P, FICHTL R, et al.Loidl. Relaxor ferroelectricity and colossal magnetocapacitive coupling in ferromagnetic CdCr2S4.Nature, 2005, 434(7031): 364-367.
[10]	WEBER S, LUNKENHEIMER P, FICHTL R, et al. Colossal magnetocapacitance and colossal magnetoresistance in HgCr2S4. Phys. Rev. Lett., 2006, 96(15): 157202-1-4.
[11]	YANG Z R, TAN S, ZHANG Y H.Magnetic polaron conductivity in FeCr2S4 with the colossal magnetoresistance effect.Phys. Rev. B., 2000, 62(21): 13872-13875.
[12]	OHGUSHI K, OGASAWARA T, OKIMOTO Y, et al. Gigantic Kerr rotation induced by a d-d transition resonance in MCr2S4 (M= Mn, Fe). Phys. Rev. B, 2005, 72(15): 155114-1-5.
[13]	PLUMIER R, SOUGI M, LECOMTE M.Magnetic properties of the weak ferromagnet NiCO3 in the paramagnetic range.Z. Phys. B Condensed Matter, 1986, 63(1): 63-67.
[14]	TANAKA M, SASAKURA H, AKAGI Y, et al.New Pb-based 1212 cuprate superconductors containing sulfur, (Pb0.75S0.25)Sr2 (Y1-xCax)Cu2Oz.J. Supercond. Nov. Magn., 2011, 24(5): 1479-1483.
[15]	HOEKSTRA B, STAPELE R V.Anomalous magnetic anisotropy and resonance linewidth in CdCr2S4.Phys. Status Solidi B, 1973, 55(2): 607-613.
[16]	GIBART P, DORMANN J L, PELLERIN Y.Magnetic properties of FeCr2S4 and CoCr2S4.Phys. Status Solidi B, 1969, 36(1): 187-194.
[17]	MARAIS, PORTE M, GOLDSTEIN I, et al.Magnetocrystalline anisotropy of the ferrimagnetic semiconductor CoCr2S4.J. Magn. Magn. Mater., 1980, 15: 1287-1288.
[18]	SHANNON R.Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides.Acta Crystallogr. A, 1976, 32(5): 751-767.
[19]	KUSTERS R, SINGLETON J, KEEN D, et al.Magnetoresistance measurements on the magnetic semiconductor Nd0.5Pb0.5MnO3.Physica B: Condens. Matter., 1989, 155(1): 362-365.
[20]	TREITINGER L, GÖBEL H, PINK H. Magnetic semiconducting spinels in the mixed system Co1-xFexCr2S4.Mater. Res. Bull., 1976, 11(11): 1375-1379.

巨磁电阻材料A_0.05Co_0.95Cr₂S₄(A=Zn、Ni、Cd、Fe)的输运行为及磁性能研究

Transport Behavior and Magnetism of Colossal Magnetoresistance Materials A_0.05Co_0.95Cr₂S₄ (A=Zn, Ni, Cd, Fe)

RichHTML

PDF (PC)