arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0911.4552cond-mat.str-elcond-mat.mtrl-sci
收藏

Pd掺杂FeRh的场致反铁磁相变低温研究

Low temperature study of field induced antiferro-ferromagnetic transition in Pd doped FeRh

Pallavi Kushwaha, Archana Lakhani, R Rawat, P Chaddah

摘要:

研究了功能材料Fe 49(Rh 0.93 Pd 0.07)51在低温和强磁场下的一级反铁磁(AFM)-铁磁(FM)相变.我们已经解决了FM到AFM过渡所需的低临界场的非单调变化。结果表明,临界慢动力学的转变占主导地位低于50 K。在低温和高磁场下,系统的状态依赖于测量历史,从而导致AFM和FM相位的可调谐共存。通过遵循不等磁场冷却和加热(CHUF)方案,表明在6 T磁场下的平衡态为AFM状态。在6 T下的玻璃状FM状态(在8 T中冷却后获得)显示出随着温度升高的凹入转变;即,失透到AFM状态,然后熔融到FM状态。

英文摘要:

The first order antiferromagnetic (AFM) to ferromagnetic (FM) transition in the functional material Fe49(Rh0.93Pd0.07)51 has been studied at low temperatures and high magnetic fields. We have addressed the non-monotonic variation of lower critical field required for FM to AFM transition. It is shown that critically slow dynamics of the transition dominates below 50 K. At low temperature and high magnetic field, state of the system depends on the measurement history resulting in tunable coexistence of AFM and FM phases. By following cooling and heating in unequal magnetic field (CHUF) protocol it is shown that equilibrium state at 6 Tesla magnetic field is AFM state. Glass like FM state at 6 T (obtained after cooling in 8 T) shows reentrant transition with increasing temperature; viz. devitrification to AFM state followed by melting to FM state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑