References
- Shalabi , AS , Kamel , MA , Elbaiomy , MA and Halim , WSA . 2006 . Opt. Mater. , 28 : 1197
- Shalabi , AS , Algaber , AS , Madi , NK , Eid , KM and Fathy , ZM . 2006 . Curr. Appl. Phys. , 6 : 19
- Schweizer , S and Spaeth , JM . 1997 . J. Phys. Chem. Solids , 58 : 859
- Lieb , RJ and Slifkin , LM . 1996 . J. Phys. Chem. Solids , 57 : 101
- Spoonhower , JP , Burberry , MS and Baxter , SM . 1986 . Solid State Commun. , 59 : 843
- John , W and Windsch , W . 1974 . J. Magn. Reson. , 16 : 454
- Zheng , WC and Wu , SY . 1998 . Physica B , 252 : 173
- Wu , SY , Fu , Q , Zhang , HM and Lu , GD . 2008 . J. Alloy. Compd. , 455 : 42
- Wu , SY , Zheng , WC and Ping , R . 2000 . Physica B , 292 : 337
- Wu , SY and Zheng , WC . 2001 . Mater. Sci. Eng. B , 86 : 92
- Van Robbroeck , L , Goovaerts , E and Schoemaker , D . 1985 . Phys. Status Solidi B , 132 : 179
- Busse , J . 1963 . Phys. Status Solidi , 3 : 1892
- Höhne , M , Stasiw , M and Watterich , A . 1969 . Phys. Status Solidi , 34 : 319
- Holmberg , GE and Slifkin , LM . 1977 . J. Phys. C: Solid State Phys. , 10 : 2897
- Chen , JJ and Du , ML . 1995 . Physica B , 215 : 260
- Brik , MG , Avram , CN and Avram , NM . 2008 . J. Phys. Chem. Solids , 69 : 1769
- Zare , RN . 1988 . Angular Momentum , New York : John Wiley and Sons .
- Kahn , O . 1993 . Molecular Magnetism , 31 New York : VCH .
- Zheng , WC . 1995 . Physica B , 205 : 269
- Newman , DJ and Urban , W . 1975 . Adv. Phys. , 24 : 793
- Van Vleck , JH . 1932 . Phys. Rev. , 41 : 208
- Zhao , MG , Du , ML and Sen , GY . 1987 . J. Phys. C: Solid State Phys. , 20 : 5557
- Abragam , A and Bleaney , B . 1970 . Electron Paramagnetic Resonance of Transition Ions , Oxford : Oxford University Press .
- Sliker , TR . 1963 . Phys. Rev. B , 130 : 1749
- Koswig , HD and Kunze , I . 1963 . Phys. Stat. Sol. , 3 : 81
- Curie , D , Barthon , C and Canny , B . 1974 . J. Chem. Phys. , 61 : 3048
- Hull , S and Keen , DA . 1999 . Phys. Rev. B , 59 : 750