Comparison of the irreversible thermomagnetic behaviour of some ferro- and ferrimagnetic systems

被引：34

作者：

Kumar, PSA ^{[1
]}

Joy, PA ^{[1
]}

Date, SK ^{[1
]}

机构：

[1] Natl Chem Lab, Phys & Mat Chem Div, Poona 411008, Maharashtra, India

来源：

BULLETIN OF MATERIALS SCIENCE | 2000年 / 23卷 / 02期

关键词：

ferromagnet; ferrimagnet; thermomagnetic irreversibility; magnetocrystalline anisotropy; coercivity;

D O I：

10.1007/BF02706549

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic behaviour of two ferromagnetic oxides and two ferrimagnetic oxides (ferrites) are compared to study the effect of magnetocrystalline anisotropy on thermal-history-dependence of magnetization of these ordered magnetic systems, All four compounds show thermomagnetic irreversibility (M-FC > M-ZFC) below a certain temperature, T-irr. The highly anisotropic ferromagnetic oxide, SrRuO3 and the hard ferrite, SrFe12O19 show sharp peaks below T-c in their M-ZFC(T) curves, whereas for the soft ferrite Ni0.8Zn0.2Fe2O4 and the lo tv anisotropic ferromagnetic oxide La0.7Ca0.3MnO3 only a broad maximum is observed in M-ZFC, when measured in small magnetic fields. The shapes of the M-ZFC(T) curves are inversely-related to the magnitude of the coercivities (H-c) of the compounds in relation to the applied field, and the temperature dependence of H-c. M-FC and M-ZFC are related through the coercivity for all four magnetic systems.

引用

页码：97 / 101

页数：5

共 21 条

[1] Effect of compositional homogeneity on the magnetic properties of La0.7Ca0.3MnO3 [J].

Anil, KPS ;

Alias, JP ;

Date, SK .

JOURNAL OF MATERIALS CHEMISTRY, 1998, 8 (05) :1219-1223

[2]

Brown WF., 1962, MAGNETOSTATIC PRINCI

[3]

Goldman A., 1990, MODERN FERRITE TECHN

[4] Frustrated pyrochlore oxides, Y2Mn2O7, Ho2Mn2O7, and Yb2Mn2O7: Bulk magnetism and magnetic microstructure [J].

Greedan, JE ;

Raju, NP ;

Maignan, A ;

Simon, C ;

Pedersen, JS ;

Niraimathi, AM ;

Gmelin, E ;

Subramanian, MA .

PHYSICAL REVIEW B, 1996, 54 (10) :7189-7200

[5] LATTICE EFFECTS ON THE MAGNETORESISTANCE IN DOPED LAMNO3 [J].

HWANG, HY ;

CHEONG, SW ;

RADAELLI, PG ;

MAREZIO, M ;

BATLOGG, B .

PHYSICAL REVIEW LETTERS, 1995, 75 (05) :914-917

[6] SPIN-GLASS BEHAVIOR AND MAGNETIC PHASE-DIAGRAM OF LA1-XSRXCOO3 (0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.5) STUDIED BY MAGNETIZATION MEASUREMENTS [J].

ITOH, M ;

NATORI, I ;

KUBOTA, S ;

MOTOYA, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1994, 63 (04) :1486-1493

[7] COERCIVITY OF HARD FERRITE SINGLE CRYSTALS [J].

JAHN, L ;

MULLER, HG .

PHYSICA STATUS SOLIDI, 1969, 35 (02) :723-&

[8] The relationship between field-cooled and zero-field-cooled susceptibilities of some ordered magnetic systems [J].

Joy, PA ;

Kumar, PSA ;

Date, SK .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (48) :11049-11054

[9] Low-T-c magnetically ordered phase of SrRuO3 [J].

Joy, PA ;

Date, SK ;

Kumar, PSA .

PHYSICAL REVIEW B, 1997, 56 (05) :2324-2327

[10]

KABANYASI A, 1976, J PHYS SOC JPN, V41, P1876

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